64633955933639 has 2 divisors, whose sum is σ = 64633955933640. Its totient is φ = 64633955933638.

The previous prime is 64633955933513. The next prime is 64633955933689. The reversal of 64633955933639 is 93633955933646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64633955933639 - 2²⁰ = 64633954885063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64633955933689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32316977966819 + 32316977966820.

It is an arithmetic number, because the mean of its divisors is an integer number (32316977966820).

Almost surely, 2^{64633955933639} is an apocalyptic number.

64633955933639 is a deficient number, since it is larger than the sum of its proper divisors (1).

64633955933639 is an equidigital number, since it uses as much as digits as its factorization.

64633955933639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3826375200, while the sum is 74.

The spelling of 64633955933639 in words is "sixty-four trillion, six hundred thirty-three billion, nine hundred fifty-five million, nine hundred thirty-three thousand, six hundred thirty-nine".