25550122656 has 24 divisors (see below), whose sum is σ = 67069072224. Its totient is φ = 8516707520.

The previous prime is 25550122607. The next prime is 25550122667. The reversal of 25550122656 is 65622105552.

It is a tau number, because it is divible by the number of its divisors (24).

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, 133073460 + ... + 133073651.

It is an arithmetic number, because the mean of its divisors is an integer number (2794544676).

Almost surely, 2^25550122656 is an apocalyptic number.

It is an amenable number.

25550122656 is an abundant number, since it is smaller than the sum of its proper divisors (41518949568).

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

25550122656 is a wasteful number, since it uses less digits than its factorization.

25550122656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266147124 (or 266147116 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 25550122656 in words is "twenty-five billion, five hundred fifty million, one hundred twenty-two thousand, six hundred fifty-six".