261296313596 has 24 divisors (see below), whose sum is σ = 484230092976. Its totient is φ = 122946871040.

The previous prime is 261296313557. The next prime is 261296313623. The reversal of 261296313596 is 695313692162.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279791 + ... + 775161.

It is an arithmetic number, because the mean of its divisors is an integer number (20176253874).

Almost surely, 2^261296313596 is an apocalyptic number.

It is an amenable number.

261296313596 is a deficient number, since it is larger than the sum of its proper divisors (222933779380).

261296313596 is a wasteful number, since it uses less digits than its factorization.

261296313596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503149 (or 503147 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 53.

The spelling of 261296313596 in words is "two hundred sixty-one billion, two hundred ninety-six million, three hundred thirteen thousand, five hundred ninety-six".