161870667904 has 64 divisors (see below), whose sum is σ = 351862325280. Its totient is φ = 73563033600.

The previous prime is 161870667877. The next prime is 161870667923. The reversal of 161870667904 is 409766078161.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×161870667904² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10697464 + ... + 10712584.

Almost surely, 2^161870667904 is an apocalyptic number.

It is an amenable number.

161870667904 is an abundant number, since it is smaller than the sum of its proper divisors (189991657376).

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

161870667904 is a wasteful number, since it uses less digits than its factorization.

161870667904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22749 (or 22737 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 161870667904 in words is "one hundred sixty-one billion, eight hundred seventy million, six hundred sixty-seven thousand, nine hundred four".