64690859111 has 4 divisors (see below), whose sum is σ = 64697482824. Its totient is φ = 64684235400.

The previous prime is 64690859059. The next prime is 64690859113. The reversal of 64690859111 is 11195809646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64690859111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64690859111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64690859113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3297185 + ... + 3316746.

It is an arithmetic number, because the mean of its divisors is an integer number (16174370706).

Almost surely, 2^64690859111 is an apocalyptic number.

64690859111 is a deficient number, since it is larger than the sum of its proper divisors (6623713).

64690859111 is an equidigital number, since it uses as much as digits as its factorization.

64690859111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6623712.

The product of its (nonzero) digits is 466560, while the sum is 50.

The spelling of 64690859111 in words is "sixty-four billion, six hundred ninety million, eight hundred fifty-nine thousand, one hundred eleven".