12796591440 has 80 divisors (see below), whose sum is σ = 39702780288. Its totient is φ = 3409555968.

The previous prime is 12796591439. The next prime is 12796591459. The reversal of 12796591440 is 4419569721.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 12796591440.

It is a congruent number.

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, 271722 + ... + 315318.

Almost surely, 2^12796591440 is an apocalyptic number.

12796591440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12796591440 is an abundant number, since it is smaller than the sum of its proper divisors (26906188848).

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

12796591440 is a wasteful number, since it uses less digits than its factorization.

12796591440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44836 (or 44830 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 12796591440 in words is "twelve billion, seven hundred ninety-six million, five hundred ninety-one thousand, four hundred forty".