25630559166 has 8 divisors (see below), whose sum is σ = 51261118344. Its totient is φ = 8543519720.

The previous prime is 25630559147. The next prime is 25630559173. The reversal of 25630559166 is 66195503652.

It is a sphenic number, since it is the product of 3 distinct primes.

25630559166 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2135879925 + ... + 2135879936.

It is an arithmetic number, because the mean of its divisors is an integer number (6407639793).

Almost surely, 2^25630559166 is an apocalyptic number.

25630559166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25630559166 is a wasteful number, since it uses less digits than its factorization.

25630559166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4271759866.

The product of its (nonzero) digits is 1458000, while the sum is 48.

The spelling of 25630559166 in words is "twenty-five billion, six hundred thirty million, five hundred fifty-nine thousand, one hundred sixty-six".