161647488 has 96 divisors (see below), whose sum is σ = 482478360. Its totient is φ = 53872128.

The previous prime is 161647471. The next prime is 161647489. The reversal of 161647488 is 884746161.

161647488 is a `hidden beast` number, since 1 + 6 + 164 + 7 + 488 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×161647488² = 52259820753420288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161647489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28506 + ... + 33702.

Almost surely, 2^161647488 is an apocalyptic number.

161647488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161647488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241239180).

161647488 is an abundant number, since it is smaller than the sum of its proper divisors (320830872).

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

161647488 is an frugal number, since it uses more digits than its factorization.

161647488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5226 (or 5202 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 161647488 is about 12714.0665406470. The cubic root of 161647488 is about 544.7404852607.

The spelling of 161647488 in words is "one hundred sixty-one million, six hundred forty-seven thousand, four hundred eighty-eight".