815490459 has 24 divisors (see below), whose sum is σ = 1425396960. Its totient is φ = 438582528.

The previous prime is 815490457. The next prime is 815490497. The reversal of 815490459 is 954094518.

It is not a de Polignac number, because 815490459 - 2¹ = 815490457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (815490457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 379644 + ... + 381785.

It is an arithmetic number, because the mean of its divisors is an integer number (59391540).

Almost surely, 2^815490459 is an apocalyptic number.

815490459 is a deficient number, since it is larger than the sum of its proper divisors (609906501).

815490459 is a wasteful number, since it uses less digits than its factorization.

815490459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761459 (or 761456 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 815490459 is about 28556.7935700071. The cubic root of 815490459 is about 934.2712000202.

The spelling of 815490459 in words is "eight hundred fifteen million, four hundred ninety thousand, four hundred fifty-nine".