815853652 has 12 divisors (see below), whose sum is σ = 1451943360. Its totient is φ = 401012696.

The previous prime is 815853637. The next prime is 815853667. The reversal of 815853652 is 256358518.

It is an interprime number because it is at equal distance from previous prime (815853637) and next prime (815853667).

It is a junction number, because it is equal to n+sod(n) for n = 815853599 and 815853608.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1728268 + ... + 1728739.

It is an arithmetic number, because the mean of its divisors is an integer number (120995280).

Almost surely, 2^815853652 is an apocalyptic number.

It is an amenable number.

815853652 is a deficient number, since it is larger than the sum of its proper divisors (636089708).

815853652 is a wasteful number, since it uses less digits than its factorization.

815853652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457070 (or 3457068 counting only the distinct ones).

The product of its digits is 288000, while the sum is 43.

The square root of 815853652 is about 28563.1519969348. The cubic root of 815853652 is about 934.4098774646.

The spelling of 815853652 in words is "eight hundred fifteen million, eight hundred fifty-three thousand, six hundred fifty-two".