63945265 has 8 divisors (see below), whose sum is σ = 77007168. Its totient is φ = 50974320.

The previous prime is 63945251. The next prime is 63945289. The reversal of 63945265 is 56254936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-63945265 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21181 + ... + 24010.

It is an arithmetic number, because the mean of its divisors is an integer number (9625896).

Almost surely, 2^63945265 is an apocalyptic number.

It is an amenable number.

63945265 is a deficient number, since it is larger than the sum of its proper divisors (13061903).

63945265 is a wasteful number, since it uses less digits than its factorization.

63945265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45479.

The product of its digits is 194400, while the sum is 40.

The square root of 63945265 is about 7996.5783307612. The cubic root of 63945265 is about 399.8859362267.

The spelling of 63945265 in words is "sixty-three million, nine hundred forty-five thousand, two hundred sixty-five".