647364965522 has 18 divisors (see below), whose sum is σ = 1067370311637. Its totient is φ = 294251113200.

The previous prime is 647364965519. The next prime is 647364965543. The reversal of 647364965522 is 225569463746.

It can be written as a sum of positive squares in 2 ways, for example, as 482064987481 + 165299978041 = 694309^2 + 406571^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=568931.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12490622 + ... + 12542342.

Almost surely, 2^647364965522 is an apocalyptic number.

647364965522 is a deficient number, since it is larger than the sum of its proper divisors (420005346115).

647364965522 is an frugal number, since it uses more digits than its factorization.

647364965522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103466 (or 51734 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 59.

The spelling of 647364965522 in words is "six hundred forty-seven billion, three hundred sixty-four million, nine hundred sixty-five thousand, five hundred twenty-two".