261611265652323 has 16 divisors (see below), whose sum is σ = 353799355663872. Its totient is φ = 171916335360000.

The previous prime is 261611265652301. The next prime is 261611265652337. The reversal of 261611265652323 is 323256562116162.

It is not a de Polignac number, because 261611265652323 - 2⁵ = 261611265652291 is a prime.

It is a super-3 number, since 3×261611265652323³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (261611265652123) by changing a digit.

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, 122983198 + ... + 125092323.

It is an arithmetic number, because the mean of its divisors is an integer number (22112459728992).

Almost surely, 2^{261611265652323} is an apocalyptic number.

261611265652323 is a deficient number, since it is larger than the sum of its proper divisors (92188090011549).

261611265652323 is a wasteful number, since it uses less digits than its factorization.

261611265652323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248080546.

The product of its digits is 4665600, while the sum is 51.

The spelling of 261611265652323 in words is "two hundred sixty-one trillion, six hundred eleven billion, two hundred sixty-five million, six hundred fifty-two thousand, three hundred twenty-three".