261460363162605 has 32 divisors (see below), whose sum is σ = 436527090984960. Its totient is φ = 133382078237760.

The previous prime is 261460363162601. The next prime is 261460363162783. The reversal of 261460363162605 is 506261363064162.

It is not a de Polignac number, because 261460363162605 - 2² = 261460363162601 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261460363162601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80929656 + ... + 84098334.

It is an arithmetic number, because the mean of its divisors is an integer number (13641471593280).

Almost surely, 2^{261460363162605} is an apocalyptic number.

It is an amenable number.

261460363162605 is a deficient number, since it is larger than the sum of its proper divisors (175066727822355).

261460363162605 is a wasteful number, since it uses less digits than its factorization.

261460363162605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407881.

The product of its (nonzero) digits is 5598720, while the sum is 51.

The spelling of 261460363162605 in words is "two hundred sixty-one trillion, four hundred sixty billion, three hundred sixty-three million, one hundred sixty-two thousand, six hundred five".