64857857111 has 4 divisors (see below), whose sum is σ = 64860896232. Its totient is φ = 64854817992.

The previous prime is 64857857083. The next prime is 64857857117. The reversal of 64857857111 is 11175875846.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 64857857111 - 2²² = 64853662807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64857857117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1487321 + ... + 1530306.

It is an arithmetic number, because the mean of its divisors is an integer number (16215224058).

Almost surely, 2^64857857111 is an apocalyptic number.

64857857111 is a deficient number, since it is larger than the sum of its proper divisors (3039121).

64857857111 is a wasteful number, since it uses less digits than its factorization.

64857857111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039120.

The product of its digits is 1881600, while the sum is 53.

The spelling of 64857857111 in words is "sixty-four billion, eight hundred fifty-seven million, eight hundred fifty-seven thousand, one hundred eleven".