640125848 has 32 divisors (see below), whose sum is σ = 1209116160. Its totient is φ = 317705760.

The previous prime is 640125833. The next prime is 640125859. The reversal of 640125848 is 848521046.

It is a happy number.

It is a super-2 number, since 2×640125848² = 819522202555438208, which contains 22 as substring.

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, 1090211 + ... + 1090797.

It is an arithmetic number, because the mean of its divisors is an integer number (37784880).

Almost surely, 2^640125848 is an apocalyptic number.

It is an amenable number.

640125848 is a deficient number, since it is larger than the sum of its proper divisors (568990312).

640125848 is a wasteful number, since it uses less digits than its factorization.

640125848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 640125848 is about 25300.7084485791. The cubic root of 640125848 is about 861.8303579976.

The spelling of 640125848 in words is "six hundred forty million, one hundred twenty-five thousand, eight hundred forty-eight".