26197061265 has 24 divisors (see below), whose sum is σ = 45598250880. Its totient is φ = 13913301024.

The previous prime is 26197061263. The next prime is 26197061273. The reversal of 26197061265 is 56216079162.

26197061265 is a `hidden beast` number, since 2 + 619 + 7 + 0 + 6 + 1 + 26 + 5 = 666.

It is not a de Polignac number, because 26197061265 - 2¹ = 26197061263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 26197061265.

It is not an unprimeable number, because it can be changed into a prime (26197061263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1207147 + ... + 1228656.

It is an arithmetic number, because the mean of its divisors is an integer number (1899927120).

Almost surely, 2^26197061265 is an apocalyptic number.

It is an amenable number.

26197061265 is a deficient number, since it is larger than the sum of its proper divisors (19401189615).

26197061265 is a wasteful number, since it uses less digits than its factorization.

26197061265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436053 (or 2436050 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 26197061265 in words is "twenty-six billion, one hundred ninety-seven million, sixty-one thousand, two hundred sixty-five".