12790740981 has 4 divisors (see below), whose sum is σ = 17054321312. Its totient is φ = 8527160652.

The previous prime is 12790740961. The next prime is 12790740983. The reversal of 12790740981 is 18904709721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12790740981 - 2³⁰ = 11716999157 is a prime.

It is a super-2 number, since 2×12790740981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12790740981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12790740983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2131790161 + ... + 2131790166.

It is an arithmetic number, because the mean of its divisors is an integer number (4263580328).

Almost surely, 2^12790740981 is an apocalyptic number.

It is an amenable number.

12790740981 is a deficient number, since it is larger than the sum of its proper divisors (4263580331).

12790740981 is an equidigital number, since it uses as much as digits as its factorization.

12790740981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4263580330.

The product of its (nonzero) digits is 254016, while the sum is 48.

The spelling of 12790740981 in words is "twelve billion, seven hundred ninety million, seven hundred forty thousand, nine hundred eighty-one".