816725153 has 4 divisors (see below), whose sum is σ = 818218800. Its totient is φ = 815231508.

The previous prime is 816725149. The next prime is 816725167. The reversal of 816725153 is 351527618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 816725153 - 2² = 816725149 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816725113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746003 + ... + 747096.

It is an arithmetic number, because the mean of its divisors is an integer number (204554700).

Almost surely, 2^816725153 is an apocalyptic number.

It is an amenable number.

816725153 is a deficient number, since it is larger than the sum of its proper divisors (1493647).

816725153 is a wasteful number, since it uses less digits than its factorization.

816725153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493646.

The product of its digits is 50400, while the sum is 38.

The square root of 816725153 is about 28578.4036118185. The cubic root of 816725153 is about 934.7424736157.

The spelling of 816725153 in words is "eight hundred sixteen million, seven hundred twenty-five thousand, one hundred fifty-three".