25640101860 has 48 divisors (see below), whose sum is σ = 74108170752. Its totient is φ = 6616800000.

The previous prime is 25640101831. The next prime is 25640101909. The reversal of 25640101860 is 6810104652.

It is an unprimeable number.

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, 6890641 + ... + 6894360.

It is an arithmetic number, because the mean of its divisors is an integer number (1543920224).

Almost surely, 2^25640101860 is an apocalyptic number.

25640101860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25640101860 is an abundant number, since it is smaller than the sum of its proper divisors (48468068892).

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

25640101860 is a wasteful number, since it uses less digits than its factorization.

25640101860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13785044 (or 13785042 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 25640101860 in words is "twenty-five billion, six hundred forty million, one hundred one thousand, eight hundred sixty".