25520416168 has 32 divisors (see below), whose sum is σ = 51623258400. Its totient is φ = 11757705408.

The previous prime is 25520416123. The next prime is 25520416169. The reversal of 25520416168 is 86161402552.

It is a self number, because there is not a number n which added to its sum of digits gives 25520416168.

It is not an unprimeable number, because it can be changed into a prime (25520416169) 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, 159378 + ... + 276481.

It is an arithmetic number, because the mean of its divisors is an integer number (1613226825).

Almost surely, 2^25520416168 is an apocalyptic number.

It is an amenable number.

25520416168 is an abundant number, since it is smaller than the sum of its proper divisors (26102842232).

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

25520416168 is a wasteful number, since it uses less digits than its factorization.

25520416168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436441 (or 436437 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 25520416168 in words is "twenty-five billion, five hundred twenty million, four hundred sixteen thousand, one hundred sixty-eight".