25630088836 has 81 divisors (see below), whose sum is σ = 52168410903. Its totient is φ = 11008063440.

The previous prime is 25630088807. The next prime is 25630088849. The reversal of 25630088836 is 63888003652.

The square root of 25630088836 is 160094.

It is a perfect power (a square), and thus also a powerful number.

It is a self number, because there is not a number n which added to its sum of digits gives 25630088836.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 66919101 + ... + 66919483.

Almost surely, 2^25630088836 is an apocalyptic number.

25630088836 is the 160094-th square number.

It is an amenable number.

25630088836 is an abundant number, since it is smaller than the sum of its proper divisors (26538322067).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25630088836 is a wasteful number, since it uses less digits than its factorization.

25630088836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 49.

Multiplying 25630088836 by its sum of digits (49), we get a square (1255874352964 = 1120658²).

The spelling of 25630088836 in words is "twenty-five billion, six hundred thirty million, eighty-eight thousand, eight hundred thirty-six".