1280999579748 has 48 divisors (see below), whose sum is σ = 3416465224704. Its totient is φ = 365949914400.

The previous prime is 1280999579737. The next prime is 1280999579789. The reversal of 1280999579748 is 8479759990821.

It is a super-2 number, since 2×1280999579748² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419790 + ... + 1654757.

It is an arithmetic number, because the mean of its divisors is an integer number (71176358848).

Almost surely, 2^{1280999579748} is an apocalyptic number.

It is an amenable number.

1280999579748 is an abundant number, since it is smaller than the sum of its proper divisors (2135465644956).

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

1280999579748 is a wasteful number, since it uses less digits than its factorization.

1280999579748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081912 (or 2081910 counting only the distinct ones).

The product of its (nonzero) digits is 823011840, while the sum is 78.

The spelling of 1280999579748 in words is "one trillion, two hundred eighty billion, nine hundred ninety-nine million, five hundred seventy-nine thousand, seven hundred forty-eight".