263887763873 has 4 divisors (see below), whose sum is σ = 263889893568. Its totient is φ = 263885634180.

The previous prime is 263887763869. The next prime is 263887763879. The reversal of 263887763873 is 378367788362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 263887763873 - 2² = 263887763869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263887763879) 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, 866693 + ... + 1130898.

It is an arithmetic number, because the mean of its divisors is an integer number (65972473392).

Almost surely, 2^263887763873 is an apocalyptic number.

It is an amenable number.

263887763873 is a deficient number, since it is larger than the sum of its proper divisors (2129695).

263887763873 is a wasteful number, since it uses less digits than its factorization.

263887763873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129694.

The product of its digits is 341397504, while the sum is 68.

The spelling of 263887763873 in words is "two hundred sixty-three billion, eight hundred eighty-seven million, seven hundred sixty-three thousand, eight hundred seventy-three".