263982128831 has 4 divisors (see below), whose sum is σ = 263987594472. Its totient is φ = 263976663192.

The previous prime is 263982128827. The next prime is 263982128897. The reversal of 263982128831 is 138821289362.

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

It is a cyclic number.

It is not a de Polignac number, because 263982128831 - 2² = 263982128827 is a prime.

It is a super-2 number, since 2×263982128831² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263982124831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2659721 + ... + 2757186.

It is an arithmetic number, because the mean of its divisors is an integer number (65996898618).

Almost surely, 2^263982128831 is an apocalyptic number.

263982128831 is a deficient number, since it is larger than the sum of its proper divisors (5465641).

263982128831 is an equidigital number, since it uses as much as digits as its factorization.

263982128831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5465640.

The product of its digits is 1990656, while the sum is 53.

The spelling of 263982128831 in words is "two hundred sixty-three billion, nine hundred eighty-two million, one hundred twenty-eight thousand, eight hundred thirty-one".