161937971424 has 36 divisors (see below), whose sum is σ = 460511107056. Its totient is φ = 53979323712.

The previous prime is 161937971417. The next prime is 161937971473. The reversal of 161937971424 is 424179739161.

161937971424 is a `hidden beast` number, since 1 + 61 + 93 + 7 + 9 + 71 + 424 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 281142024 + ... + 281142599.

It is an arithmetic number, because the mean of its divisors is an integer number (12791975196).

Almost surely, 2^161937971424 is an apocalyptic number.

It is an amenable number.

161937971424 is an abundant number, since it is smaller than the sum of its proper divisors (298573135632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161937971424 is a wasteful number, since it uses less digits than its factorization.

161937971424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562284639 (or 562284628 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The spelling of 161937971424 in words is "one hundred sixty-one billion, nine hundred thirty-seven million, nine hundred seventy-one thousand, four hundred twenty-four".