161600664491874 has 24 divisors (see below), whose sum is σ = 350198631527472. Its totient is φ = 53857063785240.

The previous prime is 161600664491863. The next prime is 161600664491881. The reversal of 161600664491874 is 478194466006161.

161600664491874 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 0 + 0 + 6 + 6 + 449 + 187 + 4 = 666.

It is a super-2 number, since 2×161600664491874² (a number of 29 digits) contains 22 as substring.

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, 818596792 + ... + 818794179.

It is an arithmetic number, because the mean of its divisors is an integer number (14591609646978).

Almost surely, 2^{161600664491874} is an apocalyptic number.

161600664491874 is an abundant number, since it is smaller than the sum of its proper divisors (188597967035598).

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

161600664491874 is a wasteful number, since it uses less digits than its factorization.

161600664491874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637396462 (or 1637396459 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 63.

The spelling of 161600664491874 in words is "one hundred sixty-one trillion, six hundred billion, six hundred sixty-four million, four hundred ninety-one thousand, eight hundred seventy-four".