647677484765 has 32 divisors (see below), whose sum is σ = 783563258880. Its totient is φ = 513930726400.

The previous prime is 647677484737. The next prime is 647677484767. The reversal of 647677484765 is 567484776746.

It is not a de Polignac number, because 647677484765 - 2³² = 643382517469 is a prime.

It is a super-2 number, since 2×647677484765² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647677484767) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 473794112 + ... + 473795478.

It is an arithmetic number, because the mean of its divisors is an integer number (24486351840).

Almost surely, 2^647677484765 is an apocalyptic number.

It is an amenable number.

647677484765 is a deficient number, since it is larger than the sum of its proper divisors (135885774115).

647677484765 is a wasteful number, since it uses less digits than its factorization.

647677484765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2893.

The product of its digits is 1327656960, while the sum is 71.

The spelling of 647677484765 in words is "six hundred forty-seven billion, six hundred seventy-seven million, four hundred eighty-four thousand, seven hundred sixty-five".