161625472 has 32 divisors (see below), whose sum is σ = 330700320. Its totient is φ = 78626304.

The previous prime is 161625467. The next prime is 161625473. The reversal of 161625472 is 274526161.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×161625472² = 52245586398445568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161625473) 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, 12328 + ... + 21799.

It is an arithmetic number, because the mean of its divisors is an integer number (10334385).

Almost surely, 2^161625472 is an apocalyptic number.

It is an amenable number.

161625472 is an abundant number, since it is smaller than the sum of its proper divisors (169074848).

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

161625472 is an equidigital number, since it uses as much as digits as its factorization.

161625472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34178 (or 34166 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 161625472 is about 12713.2006984866. The cubic root of 161625472 is about 544.7157533555.

The spelling of 161625472 in words is "one hundred sixty-one million, six hundred twenty-five thousand, four hundred seventy-two".