26853765049 has 2 divisors, whose sum is σ = 26853765050. Its totient is φ = 26853765048.

The previous prime is 26853765031. The next prime is 26853765061. The reversal of 26853765049 is 94056735862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18432949824 + 8420815225 = 135768^2 + 91765^2 .

It is a cyclic number.

It is not a de Polignac number, because 26853765049 - 2⁹ = 26853764537 is a prime.

It is a super-2 number, since 2×26853765049² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26853765019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13426882524 + 13426882525.

It is an arithmetic number, because the mean of its divisors is an integer number (13426882525).

Almost surely, 2^26853765049 is an apocalyptic number.

It is an amenable number.

26853765049 is a deficient number, since it is larger than the sum of its proper divisors (1).

26853765049 is an equidigital number, since it uses as much as digits as its factorization.

26853765049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 26853765049 in words is "twenty-six billion, eight hundred fifty-three million, seven hundred sixty-five thousand, forty-nine".