161715648 has 56 divisors (see below), whose sum is σ = 429383952. Its totient is φ = 53714944.

The previous prime is 161715613. The next prime is 161715661. The reversal of 161715648 is 846517161.

It is a super-3 number, since 3×161715648³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59536 + ... + 62192.

Almost surely, 2^161715648 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 161715648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214691976).

161715648 is an abundant number, since it is smaller than the sum of its proper divisors (267668304).

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

161715648 is a wasteful number, since it uses less digits than its factorization.

161715648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989 (or 2979 counting only the distinct ones).

The product of its digits is 40320, while the sum is 39.

The square root of 161715648 is about 12716.7467537889. The cubic root of 161715648 is about 544.8170392785.

The spelling of 161715648 in words is "one hundred sixty-one million, seven hundred fifteen thousand, six hundred forty-eight".