261786371713 has 16 divisors (see below), whose sum is σ = 266456114496. Its totient is φ = 257148103680.

The previous prime is 261786371701. The next prime is 261786371867. The reversal of 261786371713 is 317173687162.

It is not a de Polignac number, because 261786371713 - 2⁵ = 261786371681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261786374713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18458481 + ... + 18472657.

It is an arithmetic number, because the mean of its divisors is an integer number (16653507156).

Almost surely, 2^261786371713 is an apocalyptic number.

It is an amenable number.

261786371713 is a deficient number, since it is larger than the sum of its proper divisors (4669742783).

261786371713 is a wasteful number, since it uses less digits than its factorization.

261786371713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15264.

The product of its digits is 1778112, while the sum is 52.

The spelling of 261786371713 in words is "two hundred sixty-one billion, seven hundred eighty-six million, three hundred seventy-one thousand, seven hundred thirteen".