647718359477 has 8 divisors (see below), whose sum is σ = 755999544576. Its totient is φ = 543374672112.

The previous prime is 647718359417. The next prime is 647718359489. The reversal of 647718359477 is 774953817746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 647718359477 - 2²² = 647714165173 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 (647718359417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 984374078 + ... + 984374735.

It is an arithmetic number, because the mean of its divisors is an integer number (94499943072).

Almost surely, 2^647718359477 is an apocalyptic number.

It is an amenable number.

647718359477 is a deficient number, since it is larger than the sum of its proper divisors (108281185099).

647718359477 is a wasteful number, since it uses less digits than its factorization.

647718359477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968748867.

The product of its digits is 248935680, while the sum is 68.

It can be divided in two parts, 64771 and 8359477, that added together give a palindrome (8424248).

The spelling of 647718359477 in words is "six hundred forty-seven billion, seven hundred eighteen million, three hundred fifty-nine thousand, four hundred seventy-seven".