161515296 has 72 divisors (see below), whose sum is σ = 476343504. Its totient is φ = 53835840.

The previous prime is 161515279. The next prime is 161515337. The reversal of 161515296 is 692515161.

161515296 is a `hidden beast` number, since 1 + 615 + 15 + 29 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a self number, because there is not a number n which added to its sum of digits gives 161515296.

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, 2610 + ... + 18161.

It is an arithmetic number, because the mean of its divisors is an integer number (6615882).

Almost surely, 2^161515296 is an apocalyptic number.

161515296 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 161515296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238171752).

161515296 is an abundant number, since it is smaller than the sum of its proper divisors (314828208).

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

161515296 is an equidigital number, since it uses as much as digits as its factorization.

161515296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20796 (or 20776 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 161515296 is about 12708.8668259605. The cubic root of 161515296 is about 544.5919522325.

The spelling of 161515296 in words is "one hundred sixty-one million, five hundred fifteen thousand, two hundred ninety-six".