25438522004 has 24 divisors (see below), whose sum is σ = 52518240768. Its totient is φ = 10550538720.

The previous prime is 25438521961. The next prime is 25438522019. The reversal of 25438522004 is 40022583452.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14652659 + ... + 14654394.

It is an arithmetic number, because the mean of its divisors is an integer number (2188260032).

Almost surely, 2^25438522004 is an apocalyptic number.

It is an amenable number.

25438522004 is an abundant number, since it is smaller than the sum of its proper divisors (27079718764).

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

25438522004 is a wasteful number, since it uses less digits than its factorization.

25438522004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29307095 (or 29307093 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

The spelling of 25438522004 in words is "twenty-five billion, four hundred thirty-eight million, five hundred twenty-two thousand, four".