161678236 has 24 divisors (see below), whose sum is σ = 288141840. Its totient is φ = 79360512.

The previous prime is 161678227. The next prime is 161678263. The reversal of 161678236 is 632876161.

It is a happy number.

161678236 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161678236² = 52279703992143392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93750 + ... + 95458.

It is an arithmetic number, because the mean of its divisors is an integer number (12005910).

Almost surely, 2^161678236 is an apocalyptic number.

It is an amenable number.

161678236 is a deficient number, since it is larger than the sum of its proper divisors (126463604).

161678236 is a wasteful number, since it uses less digits than its factorization.

161678236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133 (or 2131 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 161678236 is about 12715.2756950056. The cubic root of 161678236 is about 544.7750225920.

The spelling of 161678236 in words is "one hundred sixty-one million, six hundred seventy-eight thousand, two hundred thirty-six".