25618580016 has 20 divisors (see below), whose sum is σ = 66181331832. Its totient is φ = 8539526656.

The previous prime is 25618580011. The next prime is 25618580027. The reversal of 25618580016 is 61008581652.

It is a self number, because there is not a number n which added to its sum of digits gives 25618580016.

It is not an unprimeable number, because it can be changed into a prime (25618580011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266860161 + ... + 266860256.

Almost surely, 2^25618580016 is an apocalyptic number.

It is an amenable number.

25618580016 is an abundant number, since it is smaller than the sum of its proper divisors (40562751816).

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

25618580016 is a wasteful number, since it uses less digits than its factorization.

25618580016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533720428 (or 533720422 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 42.

The spelling of 25618580016 in words is "twenty-five billion, six hundred eighteen million, five hundred eighty thousand, sixteen".