156256445644431 has 32 divisors (see below), whose sum is σ = 240661570300416. Its totient is φ = 89126557824000.

The previous prime is 156256445644427. The next prime is 156256445644447. The reversal of 156256445644431 is 134446544652651.

It is not a de Polignac number, because 156256445644431 - 2² = 156256445644427 is a prime.

It is a super-2 number, since 2×156256445644431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156256445644421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7886046 + ... + 19357236.

It is an arithmetic number, because the mean of its divisors is an integer number (7520674071888).

Almost surely, 2^{156256445644431} is an apocalyptic number.

156256445644431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

156256445644431 is a deficient number, since it is larger than the sum of its proper divisors (84405124655985).

156256445644431 is a wasteful number, since it uses less digits than its factorization.

156256445644431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11495503.

The product of its digits is 165888000, while the sum is 60.

The spelling of 156256445644431 in words is "one hundred fifty-six trillion, two hundred fifty-six billion, four hundred forty-five million, six hundred forty-four thousand, four hundred thirty-one".