156142551631 has 12 divisors (see below), whose sum is σ = 176266356616. Its totient is φ = 138111343920.

The previous prime is 156142551601. The next prime is 156142551641. The reversal of 156142551631 is 136155241651.

It is not a de Polignac number, because 156142551631 - 2¹⁵ = 156142518863 is a prime.

It is a super-2 number, since 2×156142551631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156142551601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17433825 + ... + 17442778.

Almost surely, 2^156142551631 is an apocalyptic number.

156142551631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

156142551631 is a deficient number, since it is larger than the sum of its proper divisors (20123804985).

156142551631 is a wasteful number, since it uses less digits than its factorization.

156142551631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34876662 (or 34876651 counting only the distinct ones).

The product of its digits is 108000, while the sum is 40.

The spelling of 156142551631 in words is "one hundred fifty-six billion, one hundred forty-two million, five hundred fifty-one thousand, six hundred thirty-one".