815161288 has 32 divisors (see below), whose sum is σ = 1619983800. Its totient is φ = 383214592.

The previous prime is 815161283. The next prime is 815161307. The reversal of 815161288 is 882161518.

815161288 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 814645764 + 515524 = 28542^2 + 718^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 815161288.

It is not an unprimeable number, because it can be changed into a prime (815161283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164706 + ... + 169582.

Almost surely, 2^815161288 is an apocalyptic number.

It is an amenable number.

815161288 is a deficient number, since it is larger than the sum of its proper divisors (804822512).

815161288 is a wasteful number, since it uses less digits than its factorization.

815161288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6129 (or 6125 counting only the distinct ones).

The product of its digits is 30720, while the sum is 40.

The square root of 815161288 is about 28551.0295436084. The cubic root of 815161288 is about 934.1454775711.

The spelling of 815161288 in words is "eight hundred fifteen million, one hundred sixty-one thousand, two hundred eighty-eight".