63913208285 has 4 divisors (see below), whose sum is σ = 76695849948. Its totient is φ = 51130566624.

The previous prime is 63913208267. The next prime is 63913208329. The reversal of 63913208285 is 58280231936.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31611773209 + 32301435076 = 177797^2 + 179726^2 .

It is a cyclic number.

It is not a de Polignac number, because 63913208285 - 2³⁴ = 46733339101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6391320824 + ... + 6391320833.

It is an arithmetic number, because the mean of its divisors is an integer number (19173962487).

Almost surely, 2^63913208285 is an apocalyptic number.

It is an amenable number.

63913208285 is a deficient number, since it is larger than the sum of its proper divisors (12782641663).

63913208285 is a wasteful number, since it uses less digits than its factorization.

63913208285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12782641662.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 63913208285 in words is "sixty-three billion, nine hundred thirteen million, two hundred eight thousand, two hundred eighty-five".