63945825 has 24 divisors (see below), whose sum is σ = 107725248. Its totient is φ = 33458880.

The previous prime is 63945809. The next prime is 63945829. The reversal of 63945825 is 52854936.

It is not a de Polignac number, because 63945825 - 2⁴ = 63945809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63945829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4069 + ... + 12018.

It is an arithmetic number, because the mean of its divisors is an integer number (4488552).

Almost surely, 2^63945825 is an apocalyptic number.

It is an amenable number.

63945825 is a deficient number, since it is larger than the sum of its proper divisors (43779423).

63945825 is a wasteful number, since it uses less digits than its factorization.

63945825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16153 (or 16148 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The square root of 63945825 is about 7996.6133456608. The cubic root of 63945825 is about 399.8871035556.

It can be divided in two parts, 639 and 45825, that added together give a palindrome (46464).

The spelling of 63945825 in words is "sixty-three million, nine hundred forty-five thousand, eight hundred twenty-five".