2261306136566 has 16 divisors (see below), whose sum is σ = 3396882600384. Its totient is φ = 1129012754184.

The previous prime is 2261306136559. The next prime is 2261306136641. The reversal of 2261306136566 is 6656316031622.

It is a super-2 number, since 2×2261306136566² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2261306136566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5383445 + ... + 5788271.

It is an arithmetic number, because the mean of its divisors is an integer number (212305162524).

Almost surely, 2^{2261306136566} is an apocalyptic number.

2261306136566 is a deficient number, since it is larger than the sum of its proper divisors (1135576463818).

2261306136566 is a wasteful number, since it uses less digits than its factorization.

2261306136566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408875.

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 2261306136566 in words is "two trillion, two hundred sixty-one billion, three hundred six million, one hundred thirty-six thousand, five hundred sixty-six".