25612633651 has 4 divisors (see below), whose sum is σ = 27941054904. Its totient is φ = 23284212400.

The previous prime is 25612633637. The next prime is 25612633661. The reversal of 25612633651 is 15633621652.

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 25612633651 - 2¹⁷ = 25612502579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25612633661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1164210610 + ... + 1164210631.

It is an arithmetic number, because the mean of its divisors is an integer number (6985263726).

Almost surely, 2^25612633651 is an apocalyptic number.

25612633651 is a deficient number, since it is larger than the sum of its proper divisors (2328421253).

25612633651 is a wasteful number, since it uses less digits than its factorization.

25612633651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328421252.

The product of its digits is 194400, while the sum is 40.

The spelling of 25612633651 in words is "twenty-five billion, six hundred twelve million, six hundred thirty-three thousand, six hundred fifty-one".