161680892 has 12 divisors (see below), whose sum is σ = 295243536. Its totient is φ = 77325600.

The previous prime is 161680889. The next prime is 161680907. The reversal of 161680892 is 298086161.

It is a super-2 number, since 2×161680892² = 52281421675831328, 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 3 ways as a sum of consecutive naturals, for example, 878609 + ... + 878792.

It is an arithmetic number, because the mean of its divisors is an integer number (24603628).

Almost surely, 2^161680892 is an apocalyptic number.

It is an amenable number.

161680892 is a deficient number, since it is larger than the sum of its proper divisors (133562644).

161680892 is a wasteful number, since it uses less digits than its factorization.

161680892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757428 (or 1757426 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 161680892 is about 12715.3801358827. The cubic root of 161680892 is about 544.7780057074.

The spelling of 161680892 in words is "one hundred sixty-one million, six hundred eighty thousand, eight hundred ninety-two".