261114462545 has 16 divisors (see below), whose sum is σ = 314288516880. Its totient is φ = 208257963264.

The previous prime is 261114462541. The next prime is 261114462559. The reversal of 261114462545 is 545264411162.

It can be written as a sum of positive squares in 8 ways, for example, as 1874630209 + 259239832336 = 43297^2 + 509156^2 .

It is a cyclic number.

It is not a de Polignac number, because 261114462545 - 2² = 261114462541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (261114462541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4320959 + ... + 4380971.

It is an arithmetic number, because the mean of its divisors is an integer number (19643032305).

Almost surely, 2^261114462545 is an apocalyptic number.

It is an amenable number.

261114462545 is a deficient number, since it is larger than the sum of its proper divisors (53174054335).

261114462545 is a wasteful number, since it uses less digits than its factorization.

261114462545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62644.

The product of its digits is 230400, while the sum is 41.

The spelling of 261114462545 in words is "two hundred sixty-one billion, one hundred fourteen million, four hundred sixty-two thousand, five hundred forty-five".