25439531870 has 32 divisors (see below), whose sum is σ = 48284964000. Its totient is φ = 9623494656.

The previous prime is 25439531863. The next prime is 25439531879. The reversal of 25439531870 is 7813593452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25439531879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6395 + ... + 225654.

It is an arithmetic number, because the mean of its divisors is an integer number (1508905125).

Almost surely, 2^25439531870 is an apocalyptic number.

25439531870 is a deficient number, since it is larger than the sum of its proper divisors (22845432130).

25439531870 is a wasteful number, since it uses less digits than its factorization.

25439531870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232652.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 25439531870 in words is "twenty-five billion, four hundred thirty-nine million, five hundred thirty-one thousand, eight hundred seventy".