647771243264 has 36 divisors (see below), whose sum is σ = 1307540402280. Its totient is φ = 320246446080.

The previous prime is 647771243257. The next prime is 647771243269. The reversal of 647771243264 is 462342177746.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (647771243269) 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, 14192702 + ... + 14238269.

It is an arithmetic number, because the mean of its divisors is an integer number (36320566730).

Almost surely, 2^647771243264 is an apocalyptic number.

647771243264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

647771243264 is an abundant number, since it is smaller than the sum of its proper divisors (659769159016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647771243264 is an equidigital number, since it uses as much as digits as its factorization.

647771243264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28431076 (or 28431062 counting only the distinct ones).

The product of its digits is 9483264, while the sum is 53.

The spelling of 647771243264 in words is "six hundred forty-seven billion, seven hundred seventy-one million, two hundred forty-three thousand, two hundred sixty-four".