25500032540 has 48 divisors (see below), whose sum is σ = 53889040800. Its totient is φ = 10135648512.

The previous prime is 25500032513. The next prime is 25500032557. The reversal of 25500032540 is 4523000552.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2129891 + ... + 2141829.

It is an arithmetic number, because the mean of its divisors is an integer number (1122688350).

Almost surely, 2^25500032540 is an apocalyptic number.

25500032540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25500032540 is an abundant number, since it is smaller than the sum of its proper divisors (28389008260).

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

25500032540 is a wasteful number, since it uses less digits than its factorization.

25500032540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12614 (or 12612 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The spelling of 25500032540 in words is "twenty-five billion, five hundred million, thirty-two thousand, five hundred forty".