261324020423 has 8 divisors (see below), whose sum is σ = 262025461440. Its totient is φ = 260623020640.

The previous prime is 261324020351. The next prime is 261324020429. The reversal of 261324020423 is 324020423162.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261324020423 - 2¹⁰ = 261324019399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261324020429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093361 + ... + 1310757.

It is an arithmetic number, because the mean of its divisors is an integer number (32753182680).

Almost surely, 2^261324020423 is an apocalyptic number.

261324020423 is a deficient number, since it is larger than the sum of its proper divisors (701441017).

261324020423 is a wasteful number, since it uses less digits than its factorization.

261324020423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220617.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 261324020423 its reverse (324020423162), we get a palindrome (585344443585).

The spelling of 261324020423 in words is "two hundred sixty-one billion, three hundred twenty-four million, twenty thousand, four hundred twenty-three".