161632724 has 48 divisors (see below), whose sum is σ = 320374656. Its totient is φ = 70704000.

The previous prime is 161632717. The next prime is 161632727. The reversal of 161632724 is 427236161.

It is a super-2 number, since 2×161632724² = 52250274935320352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161632727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163937 + ... + 164919.

It is an arithmetic number, because the mean of its divisors is an integer number (6674472).

Almost surely, 2^161632724 is an apocalyptic number.

It is an amenable number.

161632724 is a deficient number, since it is larger than the sum of its proper divisors (158741932).

161632724 is a wasteful number, since it uses less digits than its factorization.

161632724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 1134 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 161632724 is about 12713.4859106384. The cubic root of 161632724 is about 544.7239002140.

Adding to 161632724 its reverse (427236161), we get a palindrome (588868885).

It can be divided in two parts, 1616 and 32724, that multiplied together give a square (52881984 = 7272²).

The spelling of 161632724 in words is "one hundred sixty-one million, six hundred thirty-two thousand, seven hundred twenty-four".