261262336056095 has 16 divisors (see below), whose sum is σ = 342017722863648. Its totient is φ = 190008097319040.

The previous prime is 261262336056067. The next prime is 261262336056101. The reversal of 261262336056095 is 590650633262162.

It is not a de Polignac number, because 261262336056095 - 2²⁸ = 261262067620639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261262336056095.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1253717 + ... + 22893153.

It is an arithmetic number, because the mean of its divisors is an integer number (21376107678978).

Almost surely, 2^{261262336056095} is an apocalyptic number.

261262336056095 is a deficient number, since it is larger than the sum of its proper divisors (80755386807553).

261262336056095 is a wasteful number, since it uses less digits than its factorization.

261262336056095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21858970.

The product of its (nonzero) digits is 20995200, while the sum is 56.

The spelling of 261262336056095 in words is "two hundred sixty-one trillion, two hundred sixty-two billion, three hundred thirty-six million, fifty-six thousand, ninety-five".