25951464621 has 48 divisors (see below), whose sum is σ = 39793703040. Its totient is φ = 16251580800.

The previous prime is 25951464611. The next prime is 25951464653. The reversal of 25951464621 is 12646415952.

25951464621 is a `hidden beast` number, since 2 + 5 + 9 + 5 + 14 + 6 + 4 + 621 = 666.

It is not a de Polignac number, because 25951464621 - 2²² = 25947270317 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25951464611) 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 47 ways as a sum of consecutive naturals, for example, 19946671 + ... + 19947971.

It is an arithmetic number, because the mean of its divisors is an integer number (829035480).

Almost surely, 2^25951464621 is an apocalyptic number.

It is an amenable number.

25951464621 is a deficient number, since it is larger than the sum of its proper divisors (13842238419).

25951464621 is a wasteful number, since it uses less digits than its factorization.

25951464621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226 (or 2223 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The spelling of 25951464621 in words is "twenty-five billion, nine hundred fifty-one million, four hundred sixty-four thousand, six hundred twenty-one".