161377632 has 72 divisors (see below), whose sum is σ = 494230464. Its totient is φ = 49653504.

The previous prime is 161377603. The next prime is 161377679. The reversal of 161377632 is 236773161.

161377632 is a `hidden beast` number, since 1 + 6 + 13 + 7 + 7 + 632 = 666.

161377632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 17808 + ... + 25295.

It is an arithmetic number, because the mean of its divisors is an integer number (6864312).

Almost surely, 2^161377632 is an apocalyptic number.

161377632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161377632 is an abundant number, since it is smaller than the sum of its proper divisors (332852832).

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

161377632 is a wasteful number, since it uses less digits than its factorization.

161377632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43132 (or 43121 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 161377632 is about 12703.4496102437. The cubic root of 161377632 is about 544.4371846071.

The spelling of 161377632 in words is "one hundred sixty-one million, three hundred seventy-seven thousand, six hundred thirty-two".