815193023456 has 24 divisors (see below), whose sum is σ = 1834184303280. Its totient is φ = 349368438528.

The previous prime is 815193023443. The next prime is 815193023467. The reversal of 815193023456 is 654320391518.

It is a self number, because there is not a number n which added to its sum of digits gives 815193023456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1819627061 + ... + 1819627508.

It is an arithmetic number, because the mean of its divisors is an integer number (76424345970).

Almost surely, 2^815193023456 is an apocalyptic number.

It is an amenable number.

815193023456 is an abundant number, since it is smaller than the sum of its proper divisors (1018991279824).

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

815193023456 is a wasteful number, since it uses less digits than its factorization.

815193023456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3639254586 (or 3639254578 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 815193023456 in words is "eight hundred fifteen billion, one hundred ninety-three million, twenty-three thousand, four hundred fifty-six".