25890012568 has 32 divisors (see below), whose sum is σ = 55496367360. Its totient is φ = 11092165920.

The previous prime is 25890012529. The next prime is 25890012569. The reversal of 25890012568 is 86521009852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25890012569) 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, 106255 + ... + 251137.

It is an arithmetic number, because the mean of its divisors is an integer number (1734261480).

Almost surely, 2^25890012568 is an apocalyptic number.

25890012568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25890012568 is an abundant number, since it is smaller than the sum of its proper divisors (29606354792).

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

25890012568 is a wasteful number, since it uses less digits than its factorization.

25890012568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148087 (or 148083 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 25890012568 in words is "twenty-five billion, eight hundred ninety million, twelve thousand, five hundred sixty-eight".