640017167365 has 16 divisors (see below), whose sum is σ = 770861339136. Its totient is φ = 510120419200.

The previous prime is 640017167359. The next prime is 640017167381. The reversal of 640017167365 is 563761710046.

640017167365 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 640017167365 - 2²⁷ = 639882949637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11536884 + ... + 11592226.

It is an arithmetic number, because the mean of its divisors is an integer number (48178833696).

Almost surely, 2^640017167365 is an apocalyptic number.

It is an amenable number.

640017167365 is a deficient number, since it is larger than the sum of its proper divisors (130844171771).

640017167365 is a wasteful number, since it uses less digits than its factorization.

640017167365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63860.

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 640017167365 in words is "six hundred forty billion, seventeen million, one hundred sixty-seven thousand, three hundred sixty-five".