815135950580 has 24 divisors (see below), whose sum is σ = 1956326281728. Its totient is φ = 279475183008.

The previous prime is 815135950493. The next prime is 815135950591. The reversal of 815135950580 is 85059531518.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2911199684 + ... + 2911199963.

It is an arithmetic number, because the mean of its divisors is an integer number (81513595072).

Almost surely, 2^815135950580 is an apocalyptic number.

It is an amenable number.

815135950580 is an abundant number, since it is smaller than the sum of its proper divisors (1141190331148).

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

815135950580 is a wasteful number, since it uses less digits than its factorization.

815135950580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5822399663 (or 5822399661 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 50.

The spelling of 815135950580 in words is "eight hundred fifteen billion, one hundred thirty-five million, nine hundred fifty thousand, five hundred eighty".