63321217137 has 6 divisors (see below), whose sum is σ = 91463980322. Its totient is φ = 42214144752.

The previous prime is 63321217123. The next prime is 63321217153. The reversal of 63321217137 is 73171212336.

63321217137 is a `hidden beast` number, since 633 + 2 + 1 + 2 + 1 + 7 + 13 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 54158132961 + 9163084176 = 232719^2 + 95724^2 .

It is not a de Polignac number, because 63321217137 - 2⁷ = 63321217009 is a prime.

It is a super-2 number, since 2×63321217137² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63321217237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3517845388 + ... + 3517845405.

Almost surely, 2^63321217137 is an apocalyptic number.

It is an amenable number.

63321217137 is a deficient number, since it is larger than the sum of its proper divisors (28142763185).

63321217137 is a wasteful number, since it uses less digits than its factorization.

63321217137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035690799 (or 7035690796 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The spelling of 63321217137 in words is "sixty-three billion, three hundred twenty-one million, two hundred seventeen thousand, one hundred thirty-seven".