64559393893 has 4 divisors (see below), whose sum is σ = 64829517120. Its totient is φ = 64289270668.

The previous prime is 64559393861. The next prime is 64559393911. The reversal of 64559393893 is 39839395546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64559393893 - 2⁵ = 64559393861 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 (64559393693) 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, 135061255 + ... + 135061732.

It is an arithmetic number, because the mean of its divisors is an integer number (16207379280).

Almost surely, 2^64559393893 is an apocalyptic number.

It is an amenable number.

64559393893 is a deficient number, since it is larger than the sum of its proper divisors (270123227).

64559393893 is a wasteful number, since it uses less digits than its factorization.

64559393893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270123226.

The product of its digits is 94478400, while the sum is 64.

The spelling of 64559393893 in words is "sixty-four billion, five hundred fifty-nine million, three hundred ninety-three thousand, eight hundred ninety-three".