161537467680 has 144 divisors (see below), whose sum is σ = 575213970240. Its totient is φ = 41203751424.

The previous prime is 161537467661. The next prime is 161537467739. The reversal of 161537467680 is 86764735161.

161537467680 is a `hidden beast` number, since 1 + 6 + 1 + 537 + 46 + 7 + 68 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2405550 + ... + 2471789.

It is an arithmetic number, because the mean of its divisors is an integer number (3994541460).

Almost surely, 2^161537467680 is an apocalyptic number.

161537467680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161537467680 is an abundant number, since it is smaller than the sum of its proper divisors (413676502560).

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

161537467680 is a wasteful number, since it uses less digits than its factorization.

161537467680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4877383 (or 4877372 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 161537467680 in words is "one hundred sixty-one billion, five hundred thirty-seven million, four hundred sixty-seven thousand, six hundred eighty".