63915425 has 12 divisors (see below), whose sum is σ = 90577536. Its totient is φ = 43827600.

The previous prime is 63915421. The next prime is 63915443. The reversal of 63915425 is 52451936.

It is not a de Polignac number, because 63915425 - 2² = 63915421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63915421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182441 + ... + 182790.

It is an arithmetic number, because the mean of its divisors is an integer number (7548128).

Almost surely, 2^63915425 is an apocalyptic number.

It is an amenable number.

63915425 is a deficient number, since it is larger than the sum of its proper divisors (26662111).

63915425 is a wasteful number, since it uses less digits than its factorization.

63915425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365248 (or 365243 counting only the distinct ones).

The product of its digits is 32400, while the sum is 35.

The square root of 63915425 is about 7994.7123150242. The cubic root of 63915425 is about 399.8237244120.

The spelling of 63915425 in words is "sixty-three million, nine hundred fifteen thousand, four hundred twenty-five".