161093980 has 24 divisors (see below), whose sum is σ = 349211520. Its totient is φ = 62358720.

The previous prime is 161093971. The next prime is 161094007. The reversal of 161093980 is 89390161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129295 + ... + 130534.

It is an arithmetic number, because the mean of its divisors is an integer number (14550480).

Almost surely, 2^161093980 is an apocalyptic number.

161093980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161093980 is an abundant number, since it is smaller than the sum of its proper divisors (188117540).

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

161093980 is a wasteful number, since it uses less digits than its factorization.

161093980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259869 (or 259867 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 161093980 is about 12692.2803309728. The cubic root of 161093980 is about 544.1180134322.

The spelling of 161093980 in words is "one hundred sixty-one million, ninety-three thousand, nine hundred eighty".