63501716825 has 6 divisors (see below), whose sum is σ = 78742128894. Its totient is φ = 50801373440.

The previous prime is 63501716813. The next prime is 63501716833. The reversal of 63501716825 is 52861710536.

It can be written as a sum of positive squares in 3 ways, for example, as 1793691904 + 61708024921 = 42352^2 + 248411^2 .

It is not a de Polignac number, because 63501716825 - 2²⁶ = 63434607961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1270034312 + ... + 1270034361.

It is an arithmetic number, because the mean of its divisors is an integer number (13123688149).

Almost surely, 2^63501716825 is an apocalyptic number.

It is an amenable number.

63501716825 is a deficient number, since it is larger than the sum of its proper divisors (15240412069).

63501716825 is a wasteful number, since it uses less digits than its factorization.

63501716825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540068683 (or 2540068678 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 63501716825 in words is "sixty-three billion, five hundred one million, seven hundred sixteen thousand, eight hundred twenty-five".