25527407868 has 18 divisors (see below), whose sum is σ = 64527614424. Its totient is φ = 8509135944.

The previous prime is 25527407861. The next prime is 25527407869. The reversal of 25527407868 is 86870472552.

25527407868 is a `hidden beast` number, since 2 + 5 + 527 + 40 + 78 + 6 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25527407861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 354547296 + ... + 354547367.

It is an arithmetic number, because the mean of its divisors is an integer number (3584867468).

Almost surely, 2^25527407868 is an apocalyptic number.

It is an amenable number.

25527407868 is an abundant number, since it is smaller than the sum of its proper divisors (39000206556).

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

25527407868 is a wasteful number, since it uses less digits than its factorization.

25527407868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709094673 (or 709094668 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 54.

The spelling of 25527407868 in words is "twenty-five billion, five hundred twenty-seven million, four hundred seven thousand, eight hundred sixty-eight".