63685425 has 24 divisors (see below), whose sum is σ = 105528960. Its totient is φ = 33889600.

The previous prime is 63685411. The next prime is 63685429. The reversal of 63685425 is 52458636.

It is not a de Polignac number, because 63685425 - 2⁶ = 63685361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63685429) 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, 53335 + ... + 54515.

It is an arithmetic number, because the mean of its divisors is an integer number (4397040).

Almost surely, 2^63685425 is an apocalyptic number.

It is an amenable number.

63685425 is a deficient number, since it is larger than the sum of its proper divisors (41843535).

63685425 is a wasteful number, since it uses less digits than its factorization.

63685425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913 (or 1908 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The square root of 63685425 is about 7980.3148434131. The cubic root of 63685425 is about 399.3435587181.

The spelling of 63685425 in words is "sixty-three million, six hundred eighty-five thousand, four hundred twenty-five".