261082294181 has 16 divisors (see below), whose sum is σ = 265746883968. Its totient is φ = 256446993600.

The previous prime is 261082294133. The next prime is 261082294189. The reversal of 261082294181 is 181492280162.

It is a cyclic number.

It is not a de Polignac number, because 261082294181 - 2⁶ = 261082294117 is a prime.

It is a super-2 number, since 2×261082294181² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261082294189) 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, 21388826 + ... + 21401028.

It is an arithmetic number, because the mean of its divisors is an integer number (16609180248).

Almost surely, 2^261082294181 is an apocalyptic number.

It is an amenable number.

261082294181 is a deficient number, since it is larger than the sum of its proper divisors (4664589787).

261082294181 is a wasteful number, since it uses less digits than its factorization.

261082294181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13372.

The product of its (nonzero) digits is 110592, while the sum is 44.

The spelling of 261082294181 in words is "two hundred sixty-one billion, eighty-two million, two hundred ninety-four thousand, one hundred eighty-one".