159938977731 has 64 divisors (see below), whose sum is σ = 245001093120. Its totient is φ = 92043262080.

The previous prime is 159938977699. The next prime is 159938977747. The reversal of 159938977731 is 137779839951.

It is not a de Polignac number, because 159938977731 - 2⁵ = 159938977699 is a prime.

It is a super-2 number, since 2×159938977731² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is not an unprimeable number, because it can be changed into a prime (159938977531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62014600 + ... + 62017178.

It is an arithmetic number, because the mean of its divisors is an integer number (3828142080).

Almost surely, 2^159938977731 is an apocalyptic number.

159938977731 is a deficient number, since it is larger than the sum of its proper divisors (85062115389).

159938977731 is a wasteful number, since it uses less digits than its factorization.

159938977731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4136.

The product of its digits is 90016920, while the sum is 69.

The spelling of 159938977731 in words is "one hundred fifty-nine billion, nine hundred thirty-eight million, nine hundred seventy-seven thousand, seven hundred thirty-one".