156492239281 has 27 divisors (see below), whose sum is σ = 188206984953. Its totient is φ = 129738024360.

The previous prime is 156492239201. The next prime is 156492239291. The reversal of 156492239281 is 182932294651.

It is a happy number.

The square root of 156492239281 is 395591.

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

It is not a de Polignac number, because 156492239281 - 2¹¹ = 156492237233 is a prime.

It is a super-2 number, since 2×156492239281² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156492239201) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 85842336 + ... + 85844158.

Almost surely, 2^156492239281 is an apocalyptic number.

156492239281 is the 395591-st square number.

156492239281 is the 197796-th centered octagonal number.

It is an amenable number.

156492239281 is a deficient number, since it is larger than the sum of its proper divisors (31714745672).

156492239281 is an frugal number, since it uses more digits than its factorization.

156492239281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722 (or 1861 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 52.

The spelling of 156492239281 in words is "one hundred fifty-six billion, four hundred ninety-two million, two hundred thirty-nine thousand, two hundred eighty-one".