161892815 has 12 divisors (see below), whose sum is σ = 225989496. Its totient is φ = 111012048.

The previous prime is 161892767. The next prime is 161892847. The reversal of 161892815 is 518298161.

It is not a de Polignac number, because 161892815 - 2¹⁸ = 161630671 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 11 ways as a sum of consecutive naturals, for example, 330149 + ... + 330638.

It is an arithmetic number, because the mean of its divisors is an integer number (18832458).

Almost surely, 2^161892815 is an apocalyptic number.

161892815 is a deficient number, since it is larger than the sum of its proper divisors (64096681).

161892815 is an equidigital number, since it uses as much as digits as its factorization.

161892815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660806 (or 660799 counting only the distinct ones).

The product of its digits is 34560, while the sum is 41.

The square root of 161892815 is about 12723.7107401890. The cubic root of 161892815 is about 545.0159241202.

The spelling of 161892815 in words is "one hundred sixty-one million, eight hundred ninety-two thousand, eight hundred fifteen".