161975796 has 24 divisors (see below), whose sum is σ = 400176000. Its totient is φ = 50815872.

The previous prime is 161975777. The next prime is 161975839. The reversal of 161975796 is 697579161.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 396796 + ... + 397203.

It is an arithmetic number, because the mean of its divisors is an integer number (16674000).

Almost surely, 2^161975796 is an apocalyptic number.

It is an amenable number.

161975796 is an abundant number, since it is smaller than the sum of its proper divisors (238200204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161975796 is a wasteful number, since it uses less digits than its factorization.

161975796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794023 (or 794021 counting only the distinct ones).

The product of its digits is 714420, while the sum is 51.

The square root of 161975796 is about 12726.9712029218. The cubic root of 161975796 is about 545.1090273698.

The spelling of 161975796 in words is "one hundred sixty-one million, nine hundred seventy-five thousand, seven hundred ninety-six".