63251356993 has 16 divisors (see below), whose sum is σ = 69993770112. Its totient is φ = 56674800000.

The previous prime is 63251356981. The next prime is 63251356997. The reversal of 63251356993 is 39965315236.

It is a cyclic number.

It is not a de Polignac number, because 63251356993 - 2³³ = 54661422401 is a prime.

It is a super-2 number, since 2×63251356993² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63251356993.

It is not an unprimeable number, because it can be changed into a prime (63251356997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3233743 + ... + 3253243.

It is an arithmetic number, because the mean of its divisors is an integer number (4374610632).

Almost surely, 2^63251356993 is an apocalyptic number.

It is an amenable number.

63251356993 is a deficient number, since it is larger than the sum of its proper divisors (6742413119).

63251356993 is a wasteful number, since it uses less digits than its factorization.

63251356993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23736.

The product of its digits is 3936600, while the sum is 52.

The spelling of 63251356993 in words is "sixty-three billion, two hundred fifty-one million, three hundred fifty-six thousand, nine hundred ninety-three".