63625657 has 8 divisors (see below), whose sum is σ = 64422792. Its totient is φ = 62832000.

The previous prime is 63625643. The next prime is 63625693. The reversal of 63625657 is 75652636.

It can be written as a sum of positive squares in 4 ways, for example, as 10569001 + 53056656 = 3251^2 + 7284^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 63625657 - 2¹⁹ = 63101369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63625637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61807 + ... + 62827.

It is an arithmetic number, because the mean of its divisors is an integer number (8052849).

Almost surely, 2^63625657 is an apocalyptic number.

It is an amenable number.

63625657 is a deficient number, since it is larger than the sum of its proper divisors (797135).

63625657 is a wasteful number, since it uses less digits than its factorization.

63625657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739.

The product of its digits is 226800, while the sum is 40.

The square root of 63625657 is about 7976.5692499971. The cubic root of 63625657 is about 399.2185932527.

The spelling of 63625657 in words is "sixty-three million, six hundred twenty-five thousand, six hundred fifty-seven".