263688142747 has 4 divisors (see below), whose sum is σ = 267300309160. Its totient is φ = 260075976336.

The previous prime is 263688142709. The next prime is 263688142763. The reversal of 263688142747 is 747241886362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263688142747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 263688142691 and 263688142700.

It is not an unprimeable number, because it can be changed into a prime (263688142547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1806083097 + ... + 1806083242.

It is an arithmetic number, because the mean of its divisors is an integer number (66825077290).

Almost surely, 2^263688142747 is an apocalyptic number.

263688142747 is a deficient number, since it is larger than the sum of its proper divisors (3612166413).

263688142747 is an equidigital number, since it uses as much as digits as its factorization.

263688142747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3612166412.

The product of its digits is 21676032, while the sum is 58.

The spelling of 263688142747 in words is "two hundred sixty-three billion, six hundred eighty-eight million, one hundred forty-two thousand, seven hundred forty-seven".