64993840111 has 2 divisors, whose sum is σ = 64993840112. Its totient is φ = 64993840110.

The previous prime is 64993840091. The next prime is 64993840147. The reversal of 64993840111 is 11104839946.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64993840111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64993849111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32496920055 + 32496920056.

It is an arithmetic number, because the mean of its divisors is an integer number (32496920056).

Almost surely, 2^64993840111 is an apocalyptic number.

64993840111 is a deficient number, since it is larger than the sum of its proper divisors (1).

64993840111 is an equidigital number, since it uses as much as digits as its factorization.

64993840111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 64993840111 in words is "sixty-four billion, nine hundred ninety-three million, eight hundred forty thousand, one hundred eleven".