815087563684 has 9 divisors (see below), whose sum is σ = 1426406396331. Its totient is φ = 407542879020.

The previous prime is 815087563649. The next prime is 815087563711. The reversal of 815087563684 is 486365780518.

The square root of 815087563684 is 902822.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 1579939 + ... + 2031349.

Almost surely, 2^815087563684 is an apocalyptic number.

815087563684 is the 902822-nd square number.

It is an amenable number.

815087563684 is a deficient number, since it is larger than the sum of its proper divisors (611318832647).

815087563684 is an frugal number, since it uses more digits than its factorization.

815087563684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902826 (or 451413 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 61.

The spelling of 815087563684 in words is "eight hundred fifteen billion, eighty-seven million, five hundred sixty-three thousand, six hundred eighty-four".