261772275664093 has 16 divisors (see below), whose sum is σ = 278604467547840. Its totient is φ = 245249484480000.

The previous prime is 261772275664073. The next prime is 261772275664111. The reversal of 261772275664093 is 390466572277162.

It is a cyclic number.

It is not a de Polignac number, because 261772275664093 - 2⁵ = 261772275664061 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 (261772275664073) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 52189483 + ... + 56984968.

It is an arithmetic number, because the mean of its divisors is an integer number (17412779221740).

Almost surely, 2^{261772275664093} is an apocalyptic number.

It is an amenable number.

261772275664093 is a deficient number, since it is larger than the sum of its proper divisors (16832191883747).

261772275664093 is a wasteful number, since it uses less digits than its factorization.

261772275664093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109175868.

The product of its (nonzero) digits is 320060160, while the sum is 67.

The spelling of 261772275664093 in words is "two hundred sixty-one trillion, seven hundred seventy-two billion, two hundred seventy-five million, six hundred sixty-four thousand, ninety-three".