639120397311 has 24 divisors (see below), whose sum is σ = 1007196100560. Its totient is φ = 387308275200.

The previous prime is 639120397283. The next prime is 639120397337. The reversal of 639120397311 is 113793021936.

639120397311 is a `hidden beast` number, since 639 + 1 + 2 + 0 + 3 + 9 + 7 + 3 + 1 + 1 = 666.

It is not a de Polignac number, because 639120397311 - 2³⁹ = 89364583423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639120397411) 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, 735801 + ... + 1348941.

It is an arithmetic number, because the mean of its divisors is an integer number (41966504190).

Almost surely, 2^639120397311 is an apocalyptic number.

639120397311 is a deficient number, since it is larger than the sum of its proper divisors (368075703249).

639120397311 is a wasteful number, since it uses less digits than its factorization.

639120397311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623687 (or 623684 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The spelling of 639120397311 in words is "six hundred thirty-nine billion, one hundred twenty million, three hundred ninety-seven thousand, three hundred eleven".