261932688359 has 4 divisors (see below), whose sum is σ = 261942444960. Its totient is φ = 261922931760.

The previous prime is 261932688323. The next prime is 261932688377. The reversal of 261932688359 is 953886239162.

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

It is a cyclic number.

It is not a de Polignac number, because 261932688359 - 2¹² = 261932684263 is a prime.

It is a super-2 number, since 2×261932688359² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261932688559) 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, 4837919 + ... + 4891760.

It is an arithmetic number, because the mean of its divisors is an integer number (65485611240).

Almost surely, 2^261932688359 is an apocalyptic number.

261932688359 is a deficient number, since it is larger than the sum of its proper divisors (9756601).

261932688359 is an equidigital number, since it uses as much as digits as its factorization.

261932688359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9756600.

The product of its digits is 33592320, while the sum is 62.

The spelling of 261932688359 in words is "two hundred sixty-one billion, nine hundred thirty-two million, six hundred eighty-eight thousand, three hundred fifty-nine".