264390816331 has 8 divisors (see below), whose sum is σ = 264527817120. Its totient is φ = 264253858752.

The previous prime is 264390816323. The next prime is 264390816359. The reversal of 264390816331 is 133618093462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 264390816331 - 2³ = 264390816323 is a prime.

It is a super-2 number, since 2×264390816331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264390816931) 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 7 ways as a sum of consecutive naturals, for example, 21893311 + ... + 21905383.

It is an arithmetic number, because the mean of its divisors is an integer number (33065977140).

Almost surely, 2^264390816331 is an apocalyptic number.

264390816331 is a deficient number, since it is larger than the sum of its proper divisors (137000789).

264390816331 is a wasteful number, since it uses less digits than its factorization.

264390816331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21605.

The product of its (nonzero) digits is 559872, while the sum is 46.

The spelling of 264390816331 in words is "two hundred sixty-four billion, three hundred ninety million, eight hundred sixteen thousand, three hundred thirty-one".