647731236659 has 12 divisors (see below), whose sum is σ = 702425595456. Its totient is φ = 597022481952.

The previous prime is 647731236587. The next prime is 647731236679. The reversal of 647731236659 is 956632137746.

It is not a de Polignac number, because 647731236659 - 2¹² = 647731232563 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647731236598 and 647731236607.

It is not an unprimeable number, because it can be changed into a prime (647731236679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2716259 + ... + 2945084.

It is an arithmetic number, because the mean of its divisors is an integer number (58535466288).

Almost surely, 2^647731236659 is an apocalyptic number.

647731236659 is a deficient number, since it is larger than the sum of its proper divisors (54694358797).

647731236659 is a wasteful number, since it uses less digits than its factorization.

647731236659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5662046 (or 5662033 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 59.

The spelling of 647731236659 in words is "six hundred forty-seven billion, seven hundred thirty-one million, two hundred thirty-six thousand, six hundred fifty-nine".