261611047799 has 8 divisors (see below), whose sum is σ = 261863891520. Its totient is φ = 261358272000.

The previous prime is 261611047781. The next prime is 261611047807. The reversal of 261611047799 is 997740116162.

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 261611047799 - 2⁸ = 261611047543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261611047799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261611041799) 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, 10979699 + ... + 11003499.

It is an arithmetic number, because the mean of its divisors is an integer number (32732986440).

Almost surely, 2^261611047799 is an apocalyptic number.

261611047799 is a deficient number, since it is larger than the sum of its proper divisors (252843721).

261611047799 is a wasteful number, since it uses less digits than its factorization.

261611047799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33961.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 261611047799 in words is "two hundred sixty-one billion, six hundred eleven million, forty-seven thousand, seven hundred ninety-nine".