261710561199 has 8 divisors (see below), whose sum is σ = 349025830272. Its totient is φ = 174434499800.

The previous prime is 261710561069. The next prime is 261710561251. The reversal of 261710561199 is 991165017162.

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 261710561199 - 2¹² = 261710557103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261710561599) 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, 9786339 + ... + 9813044.

It is an arithmetic number, because the mean of its divisors is an integer number (43628228784).

Almost surely, 2^261710561199 is an apocalyptic number.

261710561199 is a deficient number, since it is larger than the sum of its proper divisors (87315269073).

261710561199 is a wasteful number, since it uses less digits than its factorization.

261710561199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19603837.

The product of its (nonzero) digits is 204120, while the sum is 48.

The spelling of 261710561199 in words is "two hundred sixty-one billion, seven hundred ten million, five hundred sixty-one thousand, one hundred ninety-nine".