264809819473 has 2 divisors, whose sum is σ = 264809819474. Its totient is φ = 264809819472.

The previous prime is 264809819437. The next prime is 264809819489. The reversal of 264809819473 is 374918908462.

Together with previous prime (264809819437) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233957950864 + 30851868609 = 483692^2 + 175647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264809819473 is a prime.

It is not a weakly prime, because it can be changed into another prime (264809816473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132404909736 + 132404909737.

It is an arithmetic number, because the mean of its divisors is an integer number (132404909737).

Almost surely, 2^264809819473 is an apocalyptic number.

It is an amenable number.

264809819473 is a deficient number, since it is larger than the sum of its proper divisors (1).

264809819473 is an equidigital number, since it uses as much as digits as its factorization.

264809819473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 264809819473 in words is "two hundred sixty-four billion, eight hundred nine million, eight hundred nineteen thousand, four hundred seventy-three".