261283196726 has 16 divisors (see below), whose sum is σ = 398078788464. Its totient is φ = 128601632544.

The previous prime is 261283196693. The next prime is 261283196737. The reversal of 261283196726 is 627691382162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2795165 + ... + 2887128.

It is an arithmetic number, because the mean of its divisors is an integer number (24879924279).

Almost surely, 2^261283196726 is an apocalyptic number.

261283196726 is a deficient number, since it is larger than the sum of its proper divisors (136795591738).

261283196726 is a wasteful number, since it uses less digits than its factorization.

261283196726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5682655.

The product of its digits is 2612736, while the sum is 53.

The spelling of 261283196726 in words is "two hundred sixty-one billion, two hundred eighty-three million, one hundred ninety-six thousand, seven hundred twenty-six".