8643625473 has 16 divisors (see below), whose sum is σ = 13218120576. Its totient is φ = 4921633920.

The previous prime is 8643625457. The next prime is 8643625511. The reversal of 8643625473 is 3745263468.

It is not a de Polignac number, because 8643625473 - 2⁴ = 8643625457 is a prime.

It is a super-2 number, since 2×8643625473² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8643625373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726486 + ... + 738287.

It is an arithmetic number, because the mean of its divisors is an integer number (826132536).

Almost surely, 2^8643625473 is an apocalyptic number.

It is an amenable number.

8643625473 is a deficient number, since it is larger than the sum of its proper divisors (4574495103).

8643625473 is a wasteful number, since it uses less digits than its factorization.

8643625473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465064.

The product of its digits is 2903040, while the sum is 48.

The square root of 8643625473 is about 92971.1002032352. The cubic root of 8643625473 is about 2052.2581084517.

The spelling of 8643625473 in words is "eight billion, six hundred forty-three million, six hundred twenty-five thousand, four hundred seventy-three".