1278682776140 has 288 divisors, whose sum is σ = 3479456300544. Its totient is φ = 390233303040.

The previous prime is 1278682776131. The next prime is 1278682776191. The reversal of 1278682776140 is 416772868721.

It is a self number, because there is not a number n which added to its sum of digits gives 1278682776140.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 101099297 + ... + 101111943.

It is an arithmetic number, because the mean of its divisors is an integer number (12081445488).

Almost surely, 2^{1278682776140} is an apocalyptic number.

1278682776140 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 1278682776140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1739728150272).

1278682776140 is an abundant number, since it is smaller than the sum of its proper divisors (2200773524404).

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

1278682776140 is a wasteful number, since it uses less digits than its factorization.

1278682776140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12877 (or 12868 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 59.

The spelling of 1278682776140 in words is "one trillion, two hundred seventy-eight billion, six hundred eighty-two million, seven hundred seventy-six thousand, one hundred forty".