26644455444553 has 2 divisors, whose sum is σ = 26644455444554. Its totient is φ = 26644455444552.

The previous prime is 26644455444511. The next prime is 26644455444587. The reversal of 26644455444553 is 35544455444662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14692410292624 + 11952045151929 = 3833068^2 + 3457173^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26644455444553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26644455444491 and 26644455444500.

It is not a weakly prime, because it can be changed into another prime (26644455444953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13322227722276 + 13322227722277.

It is an arithmetic number, because the mean of its divisors is an integer number (13322227722277).

Almost surely, 2^{26644455444553} is an apocalyptic number.

It is an amenable number.

26644455444553 is a deficient number, since it is larger than the sum of its proper divisors (1).

26644455444553 is an equidigital number, since it uses as much as digits as its factorization.

26644455444553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960000, while the sum is 61.

The spelling of 26644455444553 in words is "twenty-six trillion, six hundred forty-four billion, four hundred fifty-five million, four hundred forty-four thousand, five hundred fifty-three".