647777070647 has 16 divisors (see below), whose sum is σ = 768157458432. Its totient is φ = 534542492160.

The previous prime is 647777070613. The next prime is 647777070653. The reversal of 647777070647 is 746070777746.

It is a cyclic number.

It is not a de Polignac number, because 647777070647 - 2¹⁰ = 647777069623 is a prime.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 647777070647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647777070697) 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, 7691663 + ... + 7775424.

It is an arithmetic number, because the mean of its divisors is an integer number (48009841152).

Almost surely, 2^647777070647 is an apocalyptic number.

647777070647 is a deficient number, since it is larger than the sum of its proper divisors (120380387785).

647777070647 is a wasteful number, since it uses less digits than its factorization.

647777070647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15467318.

The product of its (nonzero) digits is 67765824, while the sum is 62.

The spelling of 647777070647 in words is "six hundred forty-seven billion, seven hundred seventy-seven million, seventy thousand, six hundred forty-seven".