261594872359 has 4 divisors (see below), whose sum is σ = 261596217616. Its totient is φ = 261593527104.

The previous prime is 261594872353. The next prime is 261594872449. The reversal of 261594872359 is 953278495162.

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 261594872359 - 2⁵ = 261594872327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261594872297 and 261594872306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261594872353) 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, 318954 + ... + 790519.

It is an arithmetic number, because the mean of its divisors is an integer number (65399054404).

Almost surely, 2^261594872359 is an apocalyptic number.

261594872359 is a deficient number, since it is larger than the sum of its proper divisors (1345257).

261594872359 is a wasteful number, since it uses less digits than its factorization.

261594872359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345256.

The product of its digits is 32659200, while the sum is 61.

The spelling of 261594872359 in words is "two hundred sixty-one billion, five hundred ninety-four million, eight hundred seventy-two thousand, three hundred fifty-nine".