12507681852961 has 4 divisors (see below), whose sum is σ = 12508161412912. Its totient is φ = 12507202293012.

The previous prime is 12507681852947. The next prime is 12507681853003. The reversal of 12507681852961 is 16925818670521.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 12507681852961 - 2¹¹ = 12507681850913 is a prime.

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 12507681852961.

It is not an unprimeable number, because it can be changed into a prime (12507681852901) 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, 239740851 + ... + 239793016.

It is an arithmetic number, because the mean of its divisors is an integer number (3127040353228).

Almost surely, 2^{12507681852961} is an apocalyptic number.

It is an amenable number.

12507681852961 is a deficient number, since it is larger than the sum of its proper divisors (479559951).

12507681852961 is an equidigital number, since it uses as much as digits as its factorization.

12507681852961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479559950.

The product of its (nonzero) digits is 14515200, while the sum is 61.

The spelling of 12507681852961 in words is "twelve trillion, five hundred seven billion, six hundred eighty-one million, eight hundred fifty-two thousand, nine hundred sixty-one".