161507528 has 96 divisors (see below), whose sum is σ = 389120760. Its totient is φ = 62254080.

The previous prime is 161507513. The next prime is 161507597. The reversal of 161507528 is 825705161.

It can be written as a sum of positive squares in 4 ways, for example, as 28751044 + 132756484 = 5362^2 + 11522^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 208550 + ... + 209322.

Almost surely, 2^161507528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161507528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194560380).

161507528 is an abundant number, since it is smaller than the sum of its proper divisors (227613232).

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

161507528 is a wasteful number, since it uses less digits than its factorization.

161507528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 161507528 is about 12708.5612088859. The cubic root of 161507528 is about 544.5832214637.

The spelling of 161507528 in words is "one hundred sixty-one million, five hundred seven thousand, five hundred twenty-eight".