640995924303 has 32 divisors (see below), whose sum is σ = 1095820876800. Its totient is φ = 362727224928.

The previous prime is 640995924301. The next prime is 640995924307. The reversal of 640995924303 is 303429599046.

640995924303 is a `hidden beast` number, since 6 + 4 + 0 + 9 + 9 + 592 + 43 + 0 + 3 = 666.

It is not a de Polignac number, because 640995924303 - 2¹ = 640995924301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 640995924303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640995924301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16444188 + ... + 16483121.

It is an arithmetic number, because the mean of its divisors is an integer number (34244402400).

Almost surely, 2^640995924303 is an apocalyptic number.

640995924303 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

640995924303 is a deficient number, since it is larger than the sum of its proper divisors (454824952497).

640995924303 is a wasteful number, since it uses less digits than its factorization.

640995924303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32927428 (or 32927422 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 54.

The spelling of 640995924303 in words is "six hundred forty billion, nine hundred ninety-five million, nine hundred twenty-four thousand, three hundred three".