64614543839999 has 4 divisors (see below), whose sum is σ = 64939240040400. Its totient is φ = 64289847639600.

The previous prime is 64614543839981. The next prime is 64614543840013. The reversal of 64614543839999 is 99993834541646.

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-64614543839999 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 (64614543839969) 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, 162348099902 + ... + 162348100299.

It is an arithmetic number, because the mean of its divisors is an integer number (16234810010100).

Almost surely, 2^{64614543839999} is an apocalyptic number.

64614543839999 is a deficient number, since it is larger than the sum of its proper divisors (324696200401).

64614543839999 is a wasteful number, since it uses less digits than its factorization.

64614543839999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324696200400.

The product of its digits is 5441955840, while the sum is 80.

The spelling of 64614543839999 in words is "sixty-four trillion, six hundred fourteen billion, five hundred forty-three million, eight hundred thirty-nine thousand, nine hundred ninety-nine".