815645260 has 12 divisors (see below), whose sum is σ = 1712855088. Its totient is φ = 326258096.

The previous prime is 815645239. The next prime is 815645263. The reversal of 815645260 is 62546518.

It is not an unprimeable number, because it can be changed into a prime (815645263) 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 3 ways as a sum of consecutive naturals, for example, 20391112 + ... + 20391151.

It is an arithmetic number, because the mean of its divisors is an integer number (142737924).

Almost surely, 2^815645260 is an apocalyptic number.

It is an amenable number.

815645260 is an abundant number, since it is smaller than the sum of its proper divisors (897209828).

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

815645260 is a wasteful number, since it uses less digits than its factorization.

815645260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40782272 (or 40782270 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 815645260 is about 28559.5038472310. The cubic root of 815645260 is about 934.3303124902.

The spelling of 815645260 in words is "eight hundred fifteen million, six hundred forty-five thousand, two hundred sixty".