639118522363 has 8 divisors (see below), whose sum is σ = 662594816016. Its totient is φ = 616017849600.

The previous prime is 639118522319. The next prime is 639118522369. The reversal of 639118522363 is 363225811936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-639118522363 is a prime.

It is a super-2 number, since 2×639118522363² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639118522369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93901758 + ... + 93908563.

It is an arithmetic number, because the mean of its divisors is an integer number (82824352002).

Almost surely, 2^639118522363 is an apocalyptic number.

639118522363 is a deficient number, since it is larger than the sum of its proper divisors (23476293653).

639118522363 is a wasteful number, since it uses less digits than its factorization.

639118522363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187810445.

The product of its digits is 1399680, while the sum is 49.

The spelling of 639118522363 in words is "six hundred thirty-nine billion, one hundred eighteen million, five hundred twenty-two thousand, three hundred sixty-three".