161566712846 has 24 divisors (see below), whose sum is σ = 307546286616. Its totient is φ = 62948069520.

The previous prime is 161566712837. The next prime is 161566712861. The reversal of 161566712846 is 648217665161.

It is a super-2 number, since 2×161566712846² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74937101 + ... + 74939256.

It is an arithmetic number, because the mean of its divisors is an integer number (12814428609).

Almost surely, 2^161566712846 is an apocalyptic number.

161566712846 is a deficient number, since it is larger than the sum of its proper divisors (145979573770).

161566712846 is a wasteful number, since it uses less digits than its factorization.

161566712846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149876384 (or 149876377 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The spelling of 161566712846 in words is "one hundred sixty-one billion, five hundred sixty-six million, seven hundred twelve thousand, eight hundred forty-six".