8157346961 has 4 divisors (see below), whose sum is σ = 8157582132. Its totient is φ = 8157111792.

The previous prime is 8157346937. The next prime is 8157346979. The reversal of 8157346961 is 1696437518.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4446222400 + 3711124561 = 66680^2 + 60919^2 .

It is a cyclic number.

It is not a de Polignac number, because 8157346961 - 2²⁶ = 8090238097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8157349961) 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, 54146 + ... + 138731.

It is an arithmetic number, because the mean of its divisors is an integer number (2039395533).

Almost surely, 2^8157346961 is an apocalyptic number.

It is an amenable number.

8157346961 is a deficient number, since it is larger than the sum of its proper divisors (235171).

8157346961 is a wasteful number, since it uses less digits than its factorization.

8157346961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235170.

The product of its digits is 1088640, while the sum is 50.

The square root of 8157346961 is about 90318.0323135973. The cubic root of 8157346961 is about 2013.0272084349.

The spelling of 8157346961 in words is "eight billion, one hundred fifty-seven million, three hundred forty-six thousand, nine hundred sixty-one".