161869664 has 48 divisors (see below), whose sum is σ = 365964480. Its totient is φ = 69701760.

The previous prime is 161869637. The next prime is 161869703. The reversal of 161869664 is 466968161.

It is a congruent number.

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, 5414 + ... + 18789.

It is an arithmetic number, because the mean of its divisors is an integer number (7624260).

Almost surely, 2^161869664 is an apocalyptic number.

It is an amenable number.

161869664 is an abundant number, since it is smaller than the sum of its proper divisors (204094816).

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

161869664 is a wasteful number, since it uses less digits than its factorization.

161869664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24243 (or 24235 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 161869664 is about 12722.8009494765. The cubic root of 161869664 is about 544.9899434219.

The spelling of 161869664 in words is "one hundred sixty-one million, eight hundred sixty-nine thousand, six hundred sixty-four".