647464686464746 has 16 divisors (see below), whose sum is σ = 1038507714929160. Its totient is φ = 301672538828800.

The previous prime is 647464686464671. The next prime is 647464686464753.

647464686464746 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 640491067805625 + 6973618659121 = 25307925^2 + 2640761^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 647464686464746.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94272664951 + ... + 94272671818.

Almost surely, 2^{647464686464746} is an apocalyptic number.

647464686464746 is a deficient number, since it is larger than the sum of its proper divisors (391043028464414).

647464686464746 is a wasteful number, since it uses less digits than its factorization.

647464686464746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188545336889.

The product of its digits is 74912366592, while the sum is 82.

The spelling of 647464686464746 in words is "six hundred forty-seven trillion, four hundred sixty-four billion, six hundred eighty-six million, four hundred sixty-four thousand, seven hundred forty-six".