63953395395939 has 72 divisors (see below), whose sum is σ = 107608089476160. Its totient is φ = 36494145324000.

The previous prime is 63953395395907. The next prime is 63953395395941. The reversal of 63953395395939 is 93959359335936.

63953395395939 is a `hidden beast` number, since 6 + 3 + 9 + 53 + 3 + 95 + 395 + 93 + 9 = 666.

It is not a de Polignac number, because 63953395395939 - 2⁵ = 63953395395907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63953395395949) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3840805764 + ... + 3840822414.

It is an arithmetic number, because the mean of its divisors is an integer number (1494556798280).

Almost surely, 2^{63953395395939} is an apocalyptic number.

63953395395939 is a deficient number, since it is larger than the sum of its proper divisors (43654694080221).

63953395395939 is a wasteful number, since it uses less digits than its factorization.

63953395395939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28221 (or 28211 counting only the distinct ones).

The product of its digits is 10761680250, while the sum is 81.

The spelling of 63953395395939 in words is "sixty-three trillion, nine hundred fifty-three billion, three hundred ninety-five million, three hundred ninety-five thousand, nine hundred thirty-nine".