2139136813566 has 24 divisors (see below), whose sum is σ = 4635411336504. Its totient is φ = 712951003440.

The previous prime is 2139136813523. The next prime is 2139136813601. The reversal of 2139136813566 is 6653186319312.

2139136813566 is a `hidden beast` number, since 2 + 1 + 3 + 9 + 1 + 3 + 68 + 13 + 566 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7743916 + ... + 8015391.

It is an arithmetic number, because the mean of its divisors is an integer number (193142139021).

Almost surely, 2^{2139136813566} is an apocalyptic number.

2139136813566 is an abundant number, since it is smaller than the sum of its proper divisors (2496274522938).

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

2139136813566 is a wasteful number, since it uses less digits than its factorization.

2139136813566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15766856 (or 15766853 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The spelling of 2139136813566 in words is "two trillion, one hundred thirty-nine billion, one hundred thirty-six million, eight hundred thirteen thousand, five hundred sixty-six".