318784077133 has 4 divisors (see below), whose sum is σ = 325566717120. Its totient is φ = 312001437148.

The previous prime is 318784077103. The next prime is 318784077151. The reversal of 318784077133 is 331770487813.

It is a happy number.

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 318784077133 - 2³³ = 310194142541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318784077103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3391319923 + ... + 3391320016.

It is an arithmetic number, because the mean of its divisors is an integer number (81391679280).

Almost surely, 2^318784077133 is an apocalyptic number.

It is an amenable number.

318784077133 is a deficient number, since it is larger than the sum of its proper divisors (6782639987).

318784077133 is an equidigital number, since it uses as much as digits as its factorization.

318784077133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6782639986.

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 318784077133 in words is "three hundred eighteen billion, seven hundred eighty-four million, seventy-seven thousand, one hundred thirty-three".