25040051648 has 14 divisors (see below), whose sum is σ = 49688852616. Its totient is φ = 12520025792.

The previous prime is 25040051623. The next prime is 25040051671. The reversal of 25040051648 is 84615004052.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195625340 + ... + 195625467.

Almost surely, 2^25040051648 is an apocalyptic number.

It is an amenable number.

25040051648 is a deficient number, since it is larger than the sum of its proper divisors (24648800968).

25040051648 is an equidigital number, since it uses as much as digits as its factorization.

25040051648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391250819 (or 391250809 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

The spelling of 25040051648 in words is "twenty-five billion, forty million, fifty-one thousand, six hundred forty-eight".