264993523693 has 2 divisors, whose sum is σ = 264993523694. Its totient is φ = 264993523692.

The previous prime is 264993523687. The next prime is 264993523759. The reversal of 264993523693 is 396325399462.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184193755684 + 80799768009 = 429178^2 + 284253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264993523693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264993523633) 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 as a sum of consecutive naturals, namely, 132496761846 + 132496761847.

It is an arithmetic number, because the mean of its divisors is an integer number (132496761847).

Almost surely, 2^264993523693 is an apocalyptic number.

It is an amenable number.

264993523693 is a deficient number, since it is larger than the sum of its proper divisors (1).

264993523693 is an equidigital number, since it uses as much as digits as its factorization.

264993523693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56687040, while the sum is 61.

The spelling of 264993523693 in words is "two hundred sixty-four billion, nine hundred ninety-three million, five hundred twenty-three thousand, six hundred ninety-three".