815604464 has 20 divisors (see below), whose sum is σ = 1587729480. Its totient is φ = 405867840.

The previous prime is 815604463. The next prime is 815604499. The reversal of 815604464 is 464406518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815604463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117419 + ... + 124170.

It is an arithmetic number, because the mean of its divisors is an integer number (79386474).

Almost surely, 2^815604464 is an apocalyptic number.

It is an amenable number.

815604464 is a deficient number, since it is larger than the sum of its proper divisors (772125016).

815604464 is a wasteful number, since it uses less digits than its factorization.

815604464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241808 (or 241802 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 815604464 is about 28558.7896102058. The cubic root of 815604464 is about 934.3147348133.

The spelling of 815604464 in words is "eight hundred fifteen million, six hundred four thousand, four hundred sixty-four".