161506624 has 28 divisors (see below), whose sum is σ = 327948544. Its totient is φ = 78873984.

The previous prime is 161506607. The next prime is 161506627. The reversal of 161506624 is 426605161.

161506624 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161506627) 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, 26592 + ... + 32095.

It is an arithmetic number, because the mean of its divisors is an integer number (11712448).

Almost surely, 2^161506624 is an apocalyptic number.

It is an amenable number.

161506624 is an abundant number, since it is smaller than the sum of its proper divisors (166441920).

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

161506624 is an equidigital number, since it uses as much as digits as its factorization.

161506624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58742 (or 58732 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 161506624 is about 12708.5256422608. The cubic root of 161506624 is about 544.5822054034.

The spelling of 161506624 in words is "one hundred sixty-one million, five hundred six thousand, six hundred twenty-four".