12455656605431 has 4 divisors (see below), whose sum is σ = 13413784036632. Its totient is φ = 11497529174232.

The previous prime is 12455656605383. The next prime is 12455656605433. The reversal of 12455656605431 is 13450665655421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12455656605431 - 2²² = 12455652411127 is a prime.

It is a super-2 number, since 2×12455656605431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12455656605433) 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, 479063715581 + ... + 479063715606.

It is an arithmetic number, because the mean of its divisors is an integer number (3353446009158).

Almost surely, 2^{12455656605431} is an apocalyptic number.

12455656605431 is a deficient number, since it is larger than the sum of its proper divisors (958127431201).

12455656605431 is an equidigital number, since it uses as much as digits as its factorization.

12455656605431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958127431200.

The product of its (nonzero) digits is 12960000, while the sum is 53.

The spelling of 12455656605431 in words is "twelve trillion, four hundred fifty-five billion, six hundred fifty-six million, six hundred five thousand, four hundred thirty-one".