161677636 has 12 divisors (see below), whose sum is σ = 283309180. Its totient is φ = 80732160.

The previous prime is 161677619. The next prime is 161677657. The reversal of 161677636 is 636776161.

It can be written as a sum of positive squares in 2 ways, for example, as 103917636 + 57760000 = 10194^2 + 7600^2 .

It is a super-2 number, since 2×161677636² = 52279315965096992, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 161677592 and 161677601.

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, 23205 + ... + 29356.

Almost surely, 2^161677636 is an apocalyptic number.

It is an amenable number.

161677636 is a deficient number, since it is larger than the sum of its proper divisors (121631544).

161677636 is a wasteful number, since it uses less digits than its factorization.

161677636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53334 (or 53332 counting only the distinct ones).

The product of its digits is 190512, while the sum is 43.

The square root of 161677636 is about 12715.2521013152. The cubic root of 161677636 is about 544.7743486909.

The spelling of 161677636 in words is "one hundred sixty-one million, six hundred seventy-seven thousand, six hundred thirty-six".