63957720719 has 2 divisors, whose sum is σ = 63957720720. Its totient is φ = 63957720718.

The previous prime is 63957720689. The next prime is 63957720737. The reversal of 63957720719 is 91702775936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63957720719 - 2²⁴ = 63940943503 is a prime.

It is a super-2 number, since 2×63957720719² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63957720019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31978860359 + 31978860360.

It is an arithmetic number, because the mean of its divisors is an integer number (31978860360).

Almost surely, 2^63957720719 is an apocalyptic number.

63957720719 is a deficient number, since it is larger than the sum of its proper divisors (1).

63957720719 is an equidigital number, since it uses as much as digits as its factorization.

63957720719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5000940, while the sum is 56.

The spelling of 63957720719 in words is "sixty-three billion, nine hundred fifty-seven million, seven hundred twenty thousand, seven hundred nineteen".