161927520 has 48 divisors (see below), whose sum is σ = 510073200. Its totient is φ = 43180544.

The previous prime is 161927483. The next prime is 161927527. The reversal of 161927520 is 25729161.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161927527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168195 + ... + 169154.

It is an arithmetic number, because the mean of its divisors is an integer number (10626525).

Almost surely, 2^161927520 is an apocalyptic number.

161927520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161927520 is an abundant number, since it is smaller than the sum of its proper divisors (348145680).

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

161927520 is a wasteful number, since it uses less digits than its factorization.

161927520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337367 (or 337359 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 161927520 is about 12725.0744595071. The cubic root of 161927520 is about 545.0548664006.

The spelling of 161927520 in words is "one hundred sixty-one million, nine hundred twenty-seven thousand, five hundred twenty".