12956592403618 has 4 divisors (see below), whose sum is σ = 19434888605430. Its totient is φ = 6478296201808.

The previous prime is 12956592403603. The next prime is 12956592403619. The reversal of 12956592403618 is 81630429565921.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 12249979000009 + 706613403609 = 3499997^2 + 840603^2 .

It is not an unprimeable number, because it can be changed into a prime (12956592403619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3239148100903 + ... + 3239148100906.

Almost surely, 2^{12956592403618} is an apocalyptic number.

12956592403618 is a deficient number, since it is larger than the sum of its proper divisors (6478296201812).

12956592403618 is an equidigital number, since it uses as much as digits as its factorization.

12956592403618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6478296201811.

The product of its (nonzero) digits is 27993600, while the sum is 61.

The spelling of 12956592403618 in words is "twelve trillion, nine hundred fifty-six billion, five hundred ninety-two million, four hundred three thousand, six hundred eighteen".