264886525688461 has 2 divisors, whose sum is σ = 264886525688462. Its totient is φ = 264886525688460.

The previous prime is 264886525688459. The next prime is 264886525688479. The reversal of 264886525688461 is 164886525688462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140869481634025 + 124017044054436 = 11868845^2 + 11136294^2 .

It is a cyclic number.

It is not a de Polignac number, because 264886525688461 - 2¹ = 264886525688459 is a prime.

Together with 264886525688459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264886525638461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132443262844230 + 132443262844231.

It is an arithmetic number, because the mean of its divisors is an integer number (132443262844231).

Almost surely, 2^{264886525688461} is an apocalyptic number.

It is an amenable number.

264886525688461 is a deficient number, since it is larger than the sum of its proper divisors (1).

264886525688461 is an equidigital number, since it uses as much as digits as its factorization.

264886525688461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8493465600, while the sum is 79.

Subtracting from 264886525688461 its reverse (164886525688462), we obtain a palindrome (99999999999999).

The spelling of 264886525688461 in words is "two hundred sixty-four trillion, eight hundred eighty-six billion, five hundred twenty-five million, six hundred eighty-eight thousand, four hundred sixty-one".