647564643859 has 16 divisors (see below), whose sum is σ = 741414719232. Its totient is φ = 554050351008.

The previous prime is 647564643853. The next prime is 647564643899. The reversal of 647564643859 is 958346465746.

It is a happy number.

647564643859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 647564643859 - 2³ = 647564643851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647564643794 and 647564643803.

It is not an unprimeable number, because it can be changed into a prime (647564643851) 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, 14717857 + ... + 14761789.

It is an arithmetic number, because the mean of its divisors is an integer number (46338419952).

Almost surely, 2^647564643859 is an apocalyptic number.

647564643859 is a deficient number, since it is larger than the sum of its proper divisors (93850075373).

647564643859 is a wasteful number, since it uses less digits than its factorization.

647564643859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47706.

The product of its digits is 522547200, while the sum is 67.

The spelling of 647564643859 in words is "six hundred forty-seven billion, five hundred sixty-four million, six hundred forty-three thousand, eight hundred fifty-nine".