156247068961 has 27 divisors (see below), whose sum is σ = 166017543987. Its totient is φ = 147044532000.

The previous prime is 156247068949. The next prime is 156247068973. The reversal of 156247068961 is 169860742651.

The square root of 156247068961 is 395281.

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

It is an interprime number because it is at equal distance from previous prime (156247068949) and next prime (156247068973).

It can be written as a sum of positive squares in only one way, i.e., 7528859361 + 148718209600 = 86769^2 + 385640^2 .

It is not a de Polignac number, because 156247068961 - 2²⁵ = 156213514529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156247068941) 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, 502401996 + ... + 502402306.

Almost surely, 2^156247068961 is an apocalyptic number.

156247068961 is the 395281-st square number.

156247068961 is the 197641-st centered octagonal number.

It is an amenable number.

156247068961 is a deficient number, since it is larger than the sum of its proper divisors (9770475026).

156247068961 is an frugal number, since it uses more digits than its factorization.

156247068961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 156247068961 in words is "one hundred fifty-six billion, two hundred forty-seven million, sixty-eight thousand, nine hundred sixty-one".