161594680 has 64 divisors (see below), whose sum is σ = 395287200. Its totient is φ = 59097600.

The previous prime is 161594621. The next prime is 161594689. The reversal of 161594680 is 86495161.

161594680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161594680² = 52225681208604800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161594689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55255 + ... + 58105.

Almost surely, 2^161594680 is an apocalyptic number.

161594680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161594680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197643600).

161594680 is an abundant number, since it is smaller than the sum of its proper divisors (233692520).

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

161594680 is a wasteful number, since it uses less digits than its factorization.

161594680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984 (or 2980 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 161594680 is about 12711.9896161065. The cubic root of 161594680 is about 544.6811590709.

The spelling of 161594680 in words is "one hundred sixty-one million, five hundred ninety-four thousand, six hundred eighty".