640840764300 has 144 divisors (see below), whose sum is σ = 2055886581504. Its totient is φ = 152808480000.

The previous prime is 640840764293. The next prime is 640840764337. The reversal of 640840764300 is 3467048046.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1390456 + ... + 1793055.

Almost surely, 2^640840764300 is an apocalyptic number.

640840764300 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

640840764300 is an abundant number, since it is smaller than the sum of its proper divisors (1415045817204).

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

640840764300 is a wasteful number, since it uses less digits than its factorization.

640840764300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3183600 (or 3183593 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 42.

The spelling of 640840764300 in words is "six hundred forty billion, eight hundred forty million, seven hundred sixty-four thousand, three hundred".