63516725 has 12 divisors (see below), whose sum is σ = 78877764. Its totient is φ = 50737920.

The previous prime is 63516721. The next prime is 63516751. The reversal of 63516725 is 52761536.

It can be written as a sum of positive squares in 6 ways, for example, as 1909924 + 61606801 = 1382^2 + 7849^2 .

It is not a de Polignac number, because 63516725 - 2² = 63516721 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63516721) 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, 20477 + ... + 23373.

It is an arithmetic number, because the mean of its divisors is an integer number (6573147).

Almost surely, 2^63516725 is an apocalyptic number.

It is an amenable number.

63516725 is a deficient number, since it is larger than the sum of its proper divisors (15361039).

63516725 is a wasteful number, since it uses less digits than its factorization.

63516725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3784 (or 3779 counting only the distinct ones).

The product of its digits is 37800, while the sum is 35.

The square root of 63516725 is about 7969.7380759972. The cubic root of 63516725 is about 398.9906321672.

The spelling of 63516725 in words is "sixty-three million, five hundred sixteen thousand, seven hundred twenty-five".