161523260 has 24 divisors (see below), whose sum is σ = 339973200. Its totient is φ = 64461824.

The previous prime is 161523259. The next prime is 161523281. The reversal of 161523260 is 62325161.

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, 14 + ... + 17973.

It is an arithmetic number, because the mean of its divisors is an integer number (14165550).

Almost surely, 2^161523260 is an apocalyptic number.

161523260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161523260 is an abundant number, since it is smaller than the sum of its proper divisors (178449940).

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

161523260 is a wasteful number, since it uses less digits than its factorization.

161523260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18445 (or 18443 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 161523260 is about 12709.1801466499. The cubic root of 161523260 is about 544.6009030030.

The spelling of 161523260 in words is "one hundred sixty-one million, five hundred twenty-three thousand, two hundred sixty".