4645645625 has 20 divisors (see below), whose sum is σ = 5900414388. Its totient is φ = 3655560000.

The previous prime is 4645645621. The next prime is 4645645757. The reversal of 4645645625 is 5265465464.

It can be written as a sum of positive squares in 10 ways, for example, as 3642846736 + 1002798889 = 60356^2 + 31667^2 .

It is not a de Polignac number, because 4645645625 - 2² = 4645645621 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4645645625.

It is not an unprimeable number, because it can be changed into a prime (4645645621) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22802 + ... + 99051.

Almost surely, 2^4645645625 is an apocalyptic number.

It is an amenable number.

4645645625 is a deficient number, since it is larger than the sum of its proper divisors (1254768763).

4645645625 is an equidigital number, since it uses as much as digits as its factorization.

4645645625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121934 (or 121919 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 47.

The square root of 4645645625 is about 68158.9731803524. The cubic root of 4645645625 is about 1668.5863740962.

The spelling of 4645645625 in words is "four billion, six hundred forty-five million, six hundred forty-five thousand, six hundred twenty-five".