523261634321 has 4 divisors (see below), whose sum is σ = 537403840692. Its totient is φ = 509119427952.

The previous prime is 523261634309. The next prime is 523261634327. The reversal of 523261634321 is 123436162325.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 254455678096 + 268805956225 = 504436^2 + 518465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523261634321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523261634327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7071103130 + ... + 7071103203.

It is an arithmetic number, because the mean of its divisors is an integer number (134350960173).

Almost surely, 2^523261634321 is an apocalyptic number.

It is an amenable number.

523261634321 is a deficient number, since it is larger than the sum of its proper divisors (14142206371).

523261634321 is a wasteful number, since it uses less digits than its factorization.

523261634321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14142206370.

The product of its digits is 155520, while the sum is 38.

Adding to 523261634321 its reverse (123436162325), we get a palindrome (646697796646).

The spelling of 523261634321 in words is "five hundred twenty-three billion, two hundred sixty-one million, six hundred thirty-four thousand, three hundred twenty-one".