815251605285 has 64 divisors (see below), whose sum is σ = 1411741900800. Its totient is φ = 399356275968.

The previous prime is 815251605283. The next prime is 815251605293. The reversal of 815251605285 is 582506152518.

It is not a de Polignac number, because 815251605285 - 2¹ = 815251605283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815251605281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 127799226 + ... + 127805604.

It is an arithmetic number, because the mean of its divisors is an integer number (22058467200).

Almost surely, 2^815251605285 is an apocalyptic number.

It is an amenable number.

815251605285 is a deficient number, since it is larger than the sum of its proper divisors (596490295515).

815251605285 is a wasteful number, since it uses less digits than its factorization.

815251605285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9562.

The product of its (nonzero) digits is 960000, while the sum is 48.

The spelling of 815251605285 in words is "eight hundred fifteen billion, two hundred fifty-one million, six hundred five thousand, two hundred eighty-five".