156912413969 has 4 divisors (see below), whose sum is σ = 156954138660. Its totient is φ = 156870689280.

The previous prime is 156912413921. The next prime is 156912413993. The reversal of 156912413969 is 969314219651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 969314219651 = 12007 ⋅80729093.

It can be written as a sum of positive squares in 2 ways, for example, as 103562963344 + 53349450625 = 321812^2 + 230975^2 .

It is a cyclic number.

It is not a de Polignac number, because 156912413969 - 2²⁴ = 156895636753 is a prime.

It is a super-2 number, since 2×156912413969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156912410969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20856704 + ... + 20864225.

It is an arithmetic number, because the mean of its divisors is an integer number (39238534665).

Almost surely, 2^156912413969 is an apocalyptic number.

It is an amenable number.

156912413969 is a deficient number, since it is larger than the sum of its proper divisors (41724691).

156912413969 is an equidigital number, since it uses as much as digits as its factorization.

156912413969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41724690.

The product of its digits is 3149280, while the sum is 56.

The spelling of 156912413969 in words is "one hundred fifty-six billion, nine hundred twelve million, four hundred thirteen thousand, nine hundred sixty-nine".