14571218857 has 16 divisors (see below), whose sum is σ = 16631676432. Its totient is φ = 12646563840.

The previous prime is 14571218843. The next prime is 14571218869. The reversal of 14571218857 is 75881217541.

It can be written as a sum of positive squares in 8 ways, for example, as 154654096 + 14416564761 = 12436^2 + 120069^2 .

It is a de Polignac number, because none of the positive numbers 2^k-14571218857 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 14571218857.

It is not an unprimeable number, because it can be changed into a prime (14571218897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193353 + ... + 257929.

It is an arithmetic number, because the mean of its divisors is an integer number (1039479777).

Almost surely, 2^14571218857 is an apocalyptic number.

14571218857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

14571218857 is a deficient number, since it is larger than the sum of its proper divisors (2060457575).

14571218857 is a wasteful number, since it uses less digits than its factorization.

14571218857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65628.

The product of its digits is 627200, while the sum is 49.

The spelling of 14571218857 in words is "fourteen billion, five hundred seventy-one million, two hundred eighteen thousand, eight hundred fifty-seven".