25257678870 has 16 divisors (see below), whose sum is σ = 60618429360. Its totient is φ = 6735381024.

The previous prime is 25257678869. The next prime is 25257678871. The reversal of 25257678870 is 7887675252.

It is an interprime number because it is at equal distance from previous prime (25257678869) and next prime (25257678871).

It is a self number, because there is not a number n which added to its sum of digits gives 25257678870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25257678871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420961285 + ... + 420961344.

It is an arithmetic number, because the mean of its divisors is an integer number (3788651835).

Almost surely, 2^25257678870 is an apocalyptic number.

25257678870 is an abundant number, since it is smaller than the sum of its proper divisors (35360750490).

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

25257678870 is a wasteful number, since it uses less digits than its factorization.

25257678870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841922639.

The product of its (nonzero) digits is 13171200, while the sum is 57.

The spelling of 25257678870 in words is "twenty-five billion, two hundred fifty-seven million, six hundred seventy-eight thousand, eight hundred seventy".