161612688 has 40 divisors (see below), whose sum is σ = 425383488. Its totient is φ = 52853632.

The previous prime is 161612681. The next prime is 161612719. The reversal of 161612688 is 886216161.

It is a super-2 number, since 2×161612688² = 52237321845170688, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (161612681) 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, 29220 + ... + 34307.

Almost surely, 2^161612688 is an apocalyptic number.

It is an amenable number.

161612688 is an abundant number, since it is smaller than the sum of its proper divisors (263770800).

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

161612688 is a wasteful number, since it uses less digits than its factorization.

161612688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63591 (or 63585 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 161612688 is about 12712.6979040643. The cubic root of 161612688 is about 544.7013912839.

The spelling of 161612688 in words is "one hundred sixty-one million, six hundred twelve thousand, six hundred eighty-eight".