263845872474647 has 2 divisors, whose sum is σ = 263845872474648. Its totient is φ = 263845872474646.

The previous prime is 263845872474601. The next prime is 263845872474659. The reversal of 263845872474647 is 746474278548362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263845872474647 - 2¹⁶ = 263845872409111 is a prime.

It is a super-2 number, since 2×263845872474647² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263845872474677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131922936237323 + 131922936237324.

It is an arithmetic number, because the mean of its divisors is an integer number (131922936237324).

Almost surely, 2^{263845872474647} is an apocalyptic number.

263845872474647 is a deficient number, since it is larger than the sum of its proper divisors (1).

263845872474647 is an equidigital number, since it uses as much as digits as its factorization.

263845872474647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12138577920, while the sum is 77.

The spelling of 263845872474647 in words is "two hundred sixty-three trillion, eight hundred forty-five billion, eight hundred seventy-two million, four hundred seventy-four thousand, six hundred forty-seven".