797561663264 has 24 divisors (see below), whose sum is σ = 1575152855388. Its totient is φ = 397522842880.

The previous prime is 797561663237. The next prime is 797561663279. The reversal of 797561663264 is 462366165797.

It can be written as a sum of positive squares in 2 ways, for example, as 767915710864 + 29645952400 = 876308^2 + 172180^2 .

It is a super-2 number, since 2×797561663264² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 797561663197 and 797561663206.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39301847 + ... + 39322134.

Almost surely, 2^797561663264 is an apocalyptic number.

It is an amenable number.

797561663264 is a deficient number, since it is larger than the sum of its proper divisors (777591192124).

797561663264 is a wasteful number, since it uses less digits than its factorization.

797561663264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78624308 (or 78624300 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 62.

The spelling of 797561663264 in words is "seven hundred ninety-seven billion, five hundred sixty-one million, six hundred sixty-three thousand, two hundred sixty-four".