1279194407680 has 360 divisors, whose sum is σ = 3730156772832. Its totient is φ = 419489021952.

The previous prime is 1279194407663. The next prime is 1279194407719. The reversal of 1279194407680 is 867044919721.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 70676392 + ... + 70694488.

Almost surely, 2^{1279194407680} is an apocalyptic number.

1279194407680 is a gapful number since it is divisible by the number (10) 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 1279194407680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1865078386416).

1279194407680 is an abundant number, since it is smaller than the sum of its proper divisors (2450962365152).

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

1279194407680 is an frugal number, since it uses more digits than its factorization.

1279194407680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18169 (or 18134 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 58.

The spelling of 1279194407680 in words is "one trillion, two hundred seventy-nine billion, one hundred ninety-four million, four hundred seven thousand, six hundred eighty".