815172648 has 32 divisors (see below), whose sum is σ = 2076386400. Its totient is φ = 266596928.

The previous prime is 815172581. The next prime is 815172649. The reversal of 815172648 is 846271518.

It is not an unprimeable number, because it can be changed into a prime (815172649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319158 + ... + 321701.

It is an arithmetic number, because the mean of its divisors is an integer number (64887075).

Almost surely, 2^815172648 is an apocalyptic number.

It is an amenable number.

815172648 is an abundant number, since it is smaller than the sum of its proper divisors (1261213752).

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

815172648 is a wasteful number, since it uses less digits than its factorization.

815172648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640921 (or 640917 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 815172648 is about 28551.2284849531. The cubic root of 815172648 is about 934.1498169346.

The spelling of 815172648 in words is "eight hundred fifteen million, one hundred seventy-two thousand, six hundred forty-eight".