63965696551 has 2 divisors, whose sum is σ = 63965696552. Its totient is φ = 63965696550.

The previous prime is 63965696537. The next prime is 63965696593. The reversal of 63965696551 is 15569656936.

It is a happy number.

63965696551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63965696551 - 2¹³ = 63965688359 is a prime.

It is a super-2 number, since 2×63965696551² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 63965696551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63965696521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31982848275 + 31982848276.

It is an arithmetic number, because the mean of its divisors is an integer number (31982848276).

Almost surely, 2^63965696551 is an apocalyptic number.

63965696551 is a deficient number, since it is larger than the sum of its proper divisors (1).

63965696551 is an equidigital number, since it uses as much as digits as its factorization.

63965696551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39366000, while the sum is 61.

The spelling of 63965696551 in words is "sixty-three billion, nine hundred sixty-five million, six hundred ninety-six thousand, five hundred fifty-one".