161875536 has 20 divisors (see below), whose sum is σ = 418178592. Its totient is φ = 53958496.

The previous prime is 161875531. The next prime is 161875561. The reversal of 161875536 is 635578161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161875531) 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, 1686156 + ... + 1686251.

Almost surely, 2^161875536 is an apocalyptic number.

161875536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161875536 is an abundant number, since it is smaller than the sum of its proper divisors (256303056).

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

161875536 is a wasteful number, since it uses less digits than its factorization.

161875536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372418 (or 3372412 counting only the distinct ones).

The product of its digits is 151200, while the sum is 42.

The square root of 161875536 is about 12723.0317141788. The cubic root of 161875536 is about 544.9965333786.

The spelling of 161875536 in words is "one hundred sixty-one million, eight hundred seventy-five thousand, five hundred thirty-six".