261422760709 has 8 divisors (see below), whose sum is σ = 285220470240. Its totient is φ = 237630385200.

The previous prime is 261422760689. The next prime is 261422760713. The reversal of 261422760709 is 907067224162.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261422760709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261422760719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1230679 + ... + 1427380.

It is an arithmetic number, because the mean of its divisors is an integer number (35652558780).

Almost surely, 2^261422760709 is an apocalyptic number.

It is an amenable number.

261422760709 is a deficient number, since it is larger than the sum of its proper divisors (23797709531).

261422760709 is a wasteful number, since it uses less digits than its factorization.

261422760709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2667011.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 261422760709 in words is "two hundred sixty-one billion, four hundred twenty-two million, seven hundred sixty thousand, seven hundred nine".