815606161 has 16 divisors (see below), whose sum is σ = 871819200. Its totient is φ = 760347648.

The previous prime is 815606159. The next prime is 815606189. The reversal of 815606161 is 161606518.

It is a cyclic number.

It is not a de Polignac number, because 815606161 - 2¹ = 815606159 is a prime.

It is a super-2 number, since 2×815606161² = 1330426819722315842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (815606101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1317310 + ... + 1317928.

It is an arithmetic number, because the mean of its divisors is an integer number (54488700).

Almost surely, 2^815606161 is an apocalyptic number.

It is an amenable number.

815606161 is a deficient number, since it is larger than the sum of its proper divisors (56213039).

815606161 is a wasteful number, since it uses less digits than its factorization.

815606161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 815606161 is about 28558.8193208333. The cubic root of 815606161 is about 934.3153828116.

The spelling of 815606161 in words is "eight hundred fifteen million, six hundred six thousand, one hundred sixty-one".