161636396 has 12 divisors (see below), whose sum is σ = 283363080. Its totient is φ = 80675520.

The previous prime is 161636389. The next prime is 161636407. The reversal of 161636396 is 693636161.

161636396 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161636396² = 52252649023737632, which contains 22 as substring.

161636396 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33101 + ... + 37668.

It is an arithmetic number, because the mean of its divisors is an integer number (23613590).

Almost surely, 2^161636396 is an apocalyptic number.

It is an amenable number.

161636396 is a deficient number, since it is larger than the sum of its proper divisors (121726684).

161636396 is a wasteful number, since it uses less digits than its factorization.

161636396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71344 (or 71342 counting only the distinct ones).

The product of its digits is 104976, while the sum is 41.

The square root of 161636396 is about 12713.6303233970. The cubic root of 161636396 is about 544.7280252265.

The spelling of 161636396 in words is "one hundred sixty-one million, six hundred thirty-six thousand, three hundred ninety-six".