161641296 has 60 divisors (see below), whose sum is σ = 454970880. Its totient is φ = 53570880.

The previous prime is 161641289. The next prime is 161641301. The reversal of 161641296 is 692146161.

161641296 is a `hidden beast` number, since 1 + 6 + 1 + 641 + 2 + 9 + 6 = 666.

It is a super-2 number, since 2×161641296² = 52255817145119232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 161641296.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22641 + ... + 28911.

It is an arithmetic number, because the mean of its divisors is an integer number (7582848).

Almost surely, 2^161641296 is an apocalyptic number.

161641296 is a gapful number since it is divisible by the number (16) 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 161641296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227485440).

161641296 is an abundant number, since it is smaller than the sum of its proper divisors (293329584).

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

161641296 is a wasteful number, since it uses less digits than its factorization.

161641296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6464 (or 6455 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 161641296 is about 12713.8230284993. The cubic root of 161641296 is about 544.7335296393.

The spelling of 161641296 in words is "one hundred sixty-one million, six hundred forty-one thousand, two hundred ninety-six".