161387632 has 20 divisors (see below), whose sum is σ = 357358576. Its totient is φ = 69166080.

The previous prime is 161387627. The next prime is 161387641. The reversal of 161387632 is 236783161.

It is a junction number, because it is equal to n+sod(n) for n = 161387591 and 161387600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720369 + ... + 720592.

Almost surely, 2^161387632 is an apocalyptic number.

It is an amenable number.

161387632 is an abundant number, since it is smaller than the sum of its proper divisors (195970944).

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

161387632 is a wasteful number, since it uses less digits than its factorization.

161387632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440976 (or 1440970 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 161387632 is about 12703.8431980248. The cubic root of 161387632 is about 544.4484299892.

The spelling of 161387632 in words is "one hundred sixty-one million, three hundred eighty-seven thousand, six hundred thirty-two".