161742528 has 56 divisors (see below), whose sum is σ = 475498160. Its totient is φ = 53913600.

The previous prime is 161742527. The next prime is 161742547. The reversal of 161742528 is 825247161.

161742528 is a `hidden beast` number, since 1 + 61 + 74 + 2 + 528 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 161742492 and 161742501.

It is not an unprimeable number, because it can be changed into a prime (161742521) 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, 45073 + ... + 48528.

Almost surely, 2^161742528 is an apocalyptic number.

161742528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161742528 is an abundant number, since it is smaller than the sum of its proper divisors (313755632).

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

161742528 is an equidigital number, since it uses as much as digits as its factorization.

161742528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93622 (or 93606 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 161742528 is about 12717.8035839527. The cubic root of 161742528 is about 544.8472236811.

Adding to 161742528 its reverse (825247161), we get a palindrome (986989689).

The spelling of 161742528 in words is "one hundred sixty-one million, seven hundred forty-two thousand, five hundred twenty-eight".