156941953281 has 81 divisors (see below), whose sum is σ = 241439169699. Its totient is φ = 98234754912.

The previous prime is 156941953261. The next prime is 156941953309. The reversal of 156941953281 is 182359149651.

The square root of 156941953281 is 396159.

It is a perfect power (a square), and thus also a powerful number.

156941953281 is a `hidden beast` number, since 1 + 5 + 6 + 94 + 19 + 532 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 140433815025 + 16508138256 = 374745^2 + 128484^2 .

It is not a de Polignac number, because 156941953281 - 2⁵ = 156941953249 is a prime.

It is a super-2 number, since 2×156941953281² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156941953211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1890866866 + ... + 1890866948.

Almost surely, 2^156941953281 is an apocalyptic number.

156941953281 is the 396159-th square number.

156941953281 is the 198080-th centered octagonal number.

It is an amenable number.

156941953281 is a deficient number, since it is larger than the sum of its proper divisors (84497216418).

156941953281 is an frugal number, since it uses more digits than its factorization.

156941953281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 166 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The spelling of 156941953281 in words is "one hundred fifty-six billion, nine hundred forty-one million, nine hundred fifty-three thousand, two hundred eighty-one".