26201166261 has 24 divisors (see below), whose sum is σ = 35721776160. Its totient is φ = 17081726112.

The previous prime is 26201166259. The next prime is 26201166263. The reversal of 26201166261 is 16266110262.

It is an interprime number because it is at equal distance from previous prime (26201166259) and next prime (26201166263).

It is not a de Polignac number, because 26201166261 - 2¹ = 26201166259 is a prime.

It is a super-2 number, since 2×26201166261² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26201166263) 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 23 ways as a sum of consecutive naturals, for example, 1864915 + ... + 1878911.

It is an arithmetic number, because the mean of its divisors is an integer number (1488407340).

Almost surely, 2^26201166261 is an apocalyptic number.

It is an amenable number.

26201166261 is a deficient number, since it is larger than the sum of its proper divisors (9520609899).

26201166261 is a wasteful number, since it uses less digits than its factorization.

26201166261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14273 (or 14206 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 26201166261 in words is "twenty-six billion, two hundred one million, one hundred sixty-six thousand, two hundred sixty-one".