161693080 has 16 divisors (see below), whose sum is σ = 363809520. Its totient is φ = 64677216.

The previous prime is 161693041. The next prime is 161693087. The reversal of 161693080 is 80396161.

161693080 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 2×161693080² = 52289304239772800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161693087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2021124 + ... + 2021203.

It is an arithmetic number, because the mean of its divisors is an integer number (22738095).

Almost surely, 2^161693080 is an apocalyptic number.

161693080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161693080 is an abundant number, since it is smaller than the sum of its proper divisors (202116440).

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

161693080 is a wasteful number, since it uses less digits than its factorization.

161693080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4042338 (or 4042334 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 161693080 is about 12715.8593889678. The cubic root of 161693080 is about 544.7916943741.

The spelling of 161693080 in words is "one hundred sixty-one million, six hundred ninety-three thousand, eighty".