640702376016 has 20 divisors (see below), whose sum is σ = 1655147804832. Its totient is φ = 213567458656.

The previous prime is 640702375993. The next prime is 640702376033. The reversal of 640702376016 is 610673207046.

It is a happy number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 6673983036 + ... + 6673983131.

Almost surely, 2^640702376016 is an apocalyptic number.

It is an amenable number.

640702376016 is an abundant number, since it is smaller than the sum of its proper divisors (1014445428816).

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

640702376016 is a wasteful number, since it uses less digits than its factorization.

640702376016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13347966178 (or 13347966172 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 42.

The spelling of 640702376016 in words is "six hundred forty billion, seven hundred two million, three hundred seventy-six thousand, sixteen".