161491462751884 has 6 divisors (see below), whose sum is σ = 282610059815804. Its totient is φ = 80745731375940.

The previous prime is 161491462751867. The next prime is 161491462751989. The reversal of 161491462751884 is 488157264194161.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20186432843982 + ... + 20186432843989.

Almost surely, 2^{161491462751884} is an apocalyptic number.

It is an amenable number.

161491462751884 is a deficient number, since it is larger than the sum of its proper divisors (121118597063920).

161491462751884 is a wasteful number, since it uses less digits than its factorization.

161491462751884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40372865687975 (or 40372865687973 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 67.

The spelling of 161491462751884 in words is "one hundred sixty-one trillion, four hundred ninety-one billion, four hundred sixty-two million, seven hundred fifty-one thousand, eight hundred eighty-four".