8399021625 has 96 divisors (see below), whose sum is σ = 15846824448. Its totient is φ = 4438022400.

The previous prime is 8399021623. The next prime is 8399021629. The reversal of 8399021625 is 5261209938.

It is not a de Polignac number, because 8399021625 - 2¹ = 8399021623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (8399021623) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3431152 + ... + 3433598.

It is an arithmetic number, because the mean of its divisors is an integer number (165071088).

Almost surely, 2^8399021625 is an apocalyptic number.

It is an amenable number.

8399021625 is a deficient number, since it is larger than the sum of its proper divisors (7447802823).

8399021625 is a wasteful number, since it uses less digits than its factorization.

8399021625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2590 (or 2568 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 8399021625 is about 91646.1762704806. The cubic root of 8399021625 is about 2032.7137885983.

The spelling of 8399021625 in words is "eight billion, three hundred ninety-nine million, twenty-one thousand, six hundred twenty-five".