643317713295 has 32 divisors (see below), whose sum is σ = 1043597178624. Its totient is φ = 338341536000.

The previous prime is 643317713263. The next prime is 643317713329. The reversal of 643317713295 is 592317713346.

643317713295 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 643317713295 - 2⁵ = 643317713263 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6356640 + ... + 6457050.

It is an arithmetic number, because the mean of its divisors is an integer number (32612411832).

Almost surely, 2^643317713295 is an apocalyptic number.

643317713295 is a deficient number, since it is larger than the sum of its proper divisors (400279465329).

643317713295 is a wasteful number, since it uses less digits than its factorization.

643317713295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106343.

The product of its digits is 2857680, while the sum is 51.

Adding to 643317713295 its sum of digits (51), we get a palindrome (643317713346).

The spelling of 643317713295 in words is "six hundred forty-three billion, three hundred seventeen million, seven hundred thirteen thousand, two hundred ninety-five".