25504161256 has 32 divisors (see below), whose sum is σ = 55400437440. Its totient is φ = 10780622208.

The previous prime is 25504161253. The next prime is 25504161283. The reversal of 25504161256 is 65216140552.

It is not an unprimeable number, because it can be changed into a prime (25504161253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3115306 + ... + 3123481.

It is an arithmetic number, because the mean of its divisors is an integer number (1731263670).

Almost surely, 2^25504161256 is an apocalyptic number.

It is an amenable number.

25504161256 is an abundant number, since it is smaller than the sum of its proper divisors (29896276184).

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

25504161256 is a wasteful number, since it uses less digits than its factorization.

25504161256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6238873 (or 6238869 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 25504161256 in words is "twenty-five billion, five hundred four million, one hundred sixty-one thousand, two hundred fifty-six".