261922382497 has 8 divisors (see below), whose sum is σ = 274998283200. Its totient is φ = 249116088144.

The previous prime is 261922382453. The next prime is 261922382537. The reversal of 261922382497 is 794283229162.

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

It is not a de Polignac number, because 261922382497 - 2¹¹ = 261922380449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261922382417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67399597 + ... + 67403482.

It is an arithmetic number, because the mean of its divisors is an integer number (34374785400).

Almost surely, 2^261922382497 is an apocalyptic number.

It is an amenable number.

261922382497 is a deficient number, since it is larger than the sum of its proper divisors (13075900703).

261922382497 is a wasteful number, since it uses less digits than its factorization.

261922382497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134803175.

The product of its digits is 5225472, while the sum is 55.

The spelling of 261922382497 in words is "two hundred sixty-one billion, nine hundred twenty-two million, three hundred eighty-two thousand, four hundred ninety-seven".