639932419806144 has 112 divisors (see below), whose sum is σ = 1693959151511040. Its totient is φ = 213209453076480.

The previous prime is 639932419806137. The next prime is 639932419806167. The reversal of 639932419806144 is 441608914239936.

It is a super-2 number, since 2×639932419806144² (a number of 30 digits) contains 22 as substring.

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, 5568785232 + ... + 5568900144.

Almost surely, 2^{639932419806144} is an apocalyptic number.

639932419806144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

639932419806144 is an abundant number, since it is smaller than the sum of its proper divisors (1054026731704896).

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

639932419806144 is a wasteful number, since it uses less digits than its factorization.

639932419806144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128458 (or 128448 counting only the distinct ones).

The product of its (nonzero) digits is 241864704, while the sum is 69.

The spelling of 639932419806144 in words is "six hundred thirty-nine trillion, nine hundred thirty-two billion, four hundred nineteen million, eight hundred six thousand, one hundred forty-four".