161902732 has 6 divisors (see below), whose sum is σ = 283329788. Its totient is φ = 80951364.

The previous prime is 161902729. The next prime is 161902751. The reversal of 161902732 is 237209161.

It is a junction number, because it is equal to n+sod(n) for n = 161902694 and 161902703.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20237838 + ... + 20237845.

Almost surely, 2^161902732 is an apocalyptic number.

It is an amenable number.

161902732 is a deficient number, since it is larger than the sum of its proper divisors (121427056).

161902732 is a wasteful number, since it uses less digits than its factorization.

161902732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40475687 (or 40475685 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 161902732 is about 12724.1004397168. The cubic root of 161902732 is about 545.0270524966.

The spelling of 161902732 in words is "one hundred sixty-one million, nine hundred two thousand, seven hundred thirty-two".