1278792194652 has 192 divisors, whose sum is σ = 3905444336640. Its totient is φ = 354266099712.

The previous prime is 1278792194621. The next prime is 1278792194653. The reversal of 1278792194652 is 2564912978721.

1278792194652 is a `hidden beast` number, since 1 + 2 + 7 + 87 + 92 + 1 + 9 + 465 + 2 = 666.

It is a super-2 number, since 2×1278792194652² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 1278792194652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278792194653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4310028 + ... + 4597164.

It is an arithmetic number, because the mean of its divisors is an integer number (20340855920).

Almost surely, 2^{1278792194652} is an apocalyptic number.

1278792194652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278792194652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1952722168320).

1278792194652 is an abundant number, since it is smaller than the sum of its proper divisors (2626652141988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1278792194652 is a wasteful number, since it uses less digits than its factorization.

1278792194652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287337 (or 287329 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 63.

The spelling of 1278792194652 in words is "one trillion, two hundred seventy-eight billion, seven hundred ninety-two million, one hundred ninety-four thousand, six hundred fifty-two".