161157710331 has 12 divisors (see below), whose sum is σ = 232869008320. Its totient is φ = 107398943280.

The previous prime is 161157710281. The next prime is 161157710339. The reversal of 161157710331 is 133017751161.

161157710331 is a `hidden beast` number, since 1 + 611 + 5 + 7 + 7 + 1 + 0 + 3 + 31 = 666.

It is not a de Polignac number, because 161157710331 - 2⁹ = 161157709819 is a prime.

It is a super-3 number, since 3×161157710331³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161157710339) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3268360 + ... + 3317301.

Almost surely, 2^161157710331 is an apocalyptic number.

161157710331 is a deficient number, since it is larger than the sum of its proper divisors (71711297989).

161157710331 is a wasteful number, since it uses less digits than its factorization.

161157710331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6588386 (or 6588383 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 36.

The spelling of 161157710331 in words is "one hundred sixty-one billion, one hundred fifty-seven million, seven hundred ten thousand, three hundred thirty-one".