161591159116 has 24 divisors (see below), whose sum is σ = 292133358720. Its totient is φ = 78128534400.

The previous prime is 161591159113. The next prime is 161591159137. The reversal of 161591159116 is 611951195161.

It is a super-2 number, since 2×161591159116² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (161591159113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345655 + ... + 665326.

It is an arithmetic number, because the mean of its divisors is an integer number (12172223280).

Almost surely, 2^161591159116 is an apocalyptic number.

It is an amenable number.

161591159116 is a deficient number, since it is larger than the sum of its proper divisors (130542199604).

161591159116 is a wasteful number, since it uses less digits than its factorization.

161591159116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012305 (or 1012303 counting only the distinct ones).

The product of its digits is 72900, while the sum is 46.

The spelling of 161591159116 in words is "one hundred sixty-one billion, five hundred ninety-one million, one hundred fifty-nine thousand, one hundred sixteen".