161515495 has 16 divisors (see below), whose sum is σ = 197612352. Its totient is φ = 126696960.

The previous prime is 161515469. The next prime is 161515511. The reversal of 161515495 is 594515161.

161515495 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-161515495 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131454 + ... + 132676.

It is an arithmetic number, because the mean of its divisors is an integer number (12350772).

Almost surely, 2^161515495 is an apocalyptic number.

161515495 is a deficient number, since it is larger than the sum of its proper divisors (36096857).

161515495 is a wasteful number, since it uses less digits than its factorization.

161515495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722.

The product of its digits is 27000, while the sum is 37.

The square root of 161515495 is about 12708.8746551376. The cubic root of 161515495 is about 544.5921758929.

The spelling of 161515495 in words is "one hundred sixty-one million, five hundred fifteen thousand, four hundred ninety-five".