640616752824 has 64 divisors (see below), whose sum is σ = 1681495459200. Its totient is φ = 203098245504.

The previous prime is 640616752823. The next prime is 640616752829. The reversal of 640616752824 is 428257616046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640616752823) by changing a digit.

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, 6822222 + ... + 6915485.

It is an arithmetic number, because the mean of its divisors is an integer number (26273366550).

Almost surely, 2^640616752824 is an apocalyptic number.

It is an amenable number.

640616752824 is an abundant number, since it is smaller than the sum of its proper divisors (1040878706376).

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

640616752824 is a wasteful number, since it uses less digits than its factorization.

640616752824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13737812 (or 13737808 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 640616752824 in words is "six hundred forty billion, six hundred sixteen million, seven hundred fifty-two thousand, eight hundred twenty-four".