639166703094 has 48 divisors (see below), whose sum is σ = 1390412600928. Its totient is φ = 212202118656.

The previous prime is 639166703093. The next prime is 639166703117. The reversal of 639166703094 is 490307661936.

It is a self number, because there is not a number n which added to its sum of digits gives 639166703094.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639166703093) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13223679 + ... + 13271925.

It is an arithmetic number, because the mean of its divisors is an integer number (28966929186).

Almost surely, 2^639166703094 is an apocalyptic number.

639166703094 is an abundant number, since it is smaller than the sum of its proper divisors (751245897834).

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

639166703094 is a wasteful number, since it uses less digits than its factorization.

639166703094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51189 (or 51186 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 54.

The spelling of 639166703094 in words is "six hundred thirty-nine billion, one hundred sixty-six million, seven hundred three thousand, ninety-four".