158993661736 has 64 divisors (see below), whose sum is σ = 367117228800. Its totient is φ = 62862801408.

The previous prime is 158993661733. The next prime is 158993661737. The reversal of 158993661736 is 637166399851.

It is not an unprimeable number, because it can be changed into a prime (158993661733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1236780 + ... + 1359268.

It is an arithmetic number, because the mean of its divisors is an integer number (5736206700).

Almost surely, 2^158993661736 is an apocalyptic number.

It is an amenable number.

158993661736 is an abundant number, since it is smaller than the sum of its proper divisors (208123567064).

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

158993661736 is a wasteful number, since it uses less digits than its factorization.

158993661736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124298 (or 124294 counting only the distinct ones).

The product of its digits is 44089920, while the sum is 64.

The spelling of 158993661736 in words is "one hundred fifty-eight billion, nine hundred ninety-three million, six hundred sixty-one thousand, seven hundred thirty-six".