2149772726865 has 16 divisors (see below), whose sum is σ = 3440177424000. Its totient is φ = 1146365100672.

The previous prime is 2149772726851. The next prime is 2149772726869. The reversal of 2149772726865 is 5686272779412.

It is not a de Polignac number, because 2149772726865 - 2⁷ = 2149772726737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2149772726796 and 2149772726805.

It is not an unprimeable number, because it can be changed into a prime (2149772726869) 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, 11173540 + ... + 11364309.

It is an arithmetic number, because the mean of its divisors is an integer number (215011089000).

Almost surely, 2^{2149772726865} is an apocalyptic number.

It is an amenable number.

2149772726865 is a deficient number, since it is larger than the sum of its proper divisors (1290404697135).

2149772726865 is a wasteful number, since it uses less digits than its factorization.

2149772726865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22544216.

The product of its digits is 142248960, while the sum is 66.

The spelling of 2149772726865 in words is "two trillion, one hundred forty-nine billion, seven hundred seventy-two million, seven hundred twenty-six thousand, eight hundred sixty-five".