63555025 has 6 divisors (see below), whose sum is σ = 78808262. Its totient is φ = 50844000.

The previous prime is 63555007. The next prime is 63555029. The reversal of 63555025 is 52055536.

It can be written as a sum of positive squares in 3 ways, for example, as 638401 + 62916624 = 799^2 + 7932^2 .

It is not a de Polignac number, because 63555025 - 2²³ = 55166417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63555029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1271076 + ... + 1271125.

Almost surely, 2^63555025 is an apocalyptic number.

It is an amenable number.

63555025 is a deficient number, since it is larger than the sum of its proper divisors (15253237).

63555025 is a wasteful number, since it uses less digits than its factorization.

63555025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542211 (or 2542206 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 31.

The square root of 63555025 is about 7972.1405532015. The cubic root of 63555025 is about 399.0708119453.

The spelling of 63555025 in words is "sixty-three million, five hundred fifty-five thousand, twenty-five".