263487043856656 has 15 divisors (see below), whose sum is σ = 510506273272503. Its totient is φ = 131743489463760.

The previous prime is 263487043856629. The next prime is 263487043856737. The reversal of 263487043856656 is 656658340784362.

The square root of 263487043856656 is 16232284.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 62900101 + ... + 66958171.

Almost surely, 2^{263487043856656} is an apocalyptic number.

263487043856656 is the 16232284-th square number.

It is an amenable number.

263487043856656 is a deficient number, since it is larger than the sum of its proper divisors (247019229415847).

263487043856656 is an frugal number, since it uses more digits than its factorization.

263487043856656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8116150 (or 4058073 counting only the distinct ones).

The product of its (nonzero) digits is 4180377600, while the sum is 73.

The spelling of 263487043856656 in words is "two hundred sixty-three trillion, four hundred eighty-seven billion, forty-three million, eight hundred fifty-six thousand, six hundred fifty-six".