261133422623 has 2 divisors, whose sum is σ = 261133422624. Its totient is φ = 261133422622.

The previous prime is 261133422617. The next prime is 261133422661. The reversal of 261133422623 is 326224331162.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261133422623 - 2⁴ = 261133422607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261133422223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130566711311 + 130566711312.

It is an arithmetic number, because the mean of its divisors is an integer number (130566711312).

Almost surely, 2^261133422623 is an apocalyptic number.

261133422623 is a deficient number, since it is larger than the sum of its proper divisors (1).

261133422623 is an equidigital number, since it uses as much as digits as its factorization.

261133422623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 35.

Adding to 261133422623 its reverse (326224331162), we get a palindrome (587357753785).

The spelling of 261133422623 in words is "two hundred sixty-one billion, one hundred thirty-three million, four hundred twenty-two thousand, six hundred twenty-three".