263380833809 has 2 divisors, whose sum is σ = 263380833810. Its totient is φ = 263380833808.

The previous prime is 263380833787. The next prime is 263380833901. The reversal of 263380833809 is 908338083362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165524481409 + 97856352400 = 406847^2 + 312820^2 .

It is a cyclic number.

It is not a de Polignac number, because 263380833809 - 2²⁰ = 263379785233 is a prime.

It is not a weakly prime, because it can be changed into another prime (263380853809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131690416904 + 131690416905.

It is an arithmetic number, because the mean of its divisors is an integer number (131690416905).

Almost surely, 2^263380833809 is an apocalyptic number.

It is an amenable number.

263380833809 is a deficient number, since it is larger than the sum of its proper divisors (1).

263380833809 is an equidigital number, since it uses as much as digits as its factorization.

263380833809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 53.

The spelling of 263380833809 in words is "two hundred sixty-three billion, three hundred eighty million, eight hundred thirty-three thousand, eight hundred nine".