26844399553 has 2 divisors, whose sum is σ = 26844399554. Its totient is φ = 26844399552.

The previous prime is 26844399511. The next prime is 26844399613. The reversal of 26844399553 is 35599344862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24076797889 + 2767601664 = 155167^2 + 52608^2 .

It is a cyclic number.

It is not a de Polignac number, because 26844399553 - 2⁹ = 26844399041 is a prime.

It is a super-2 number, since 2×26844399553² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26844399053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13422199776 + 13422199777.

It is an arithmetic number, because the mean of its divisors is an integer number (13422199777).

Almost surely, 2^26844399553 is an apocalyptic number.

It is an amenable number.

26844399553 is a deficient number, since it is larger than the sum of its proper divisors (1).

26844399553 is an equidigital number, since it uses as much as digits as its factorization.

26844399553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27993600, while the sum is 58.

The spelling of 26844399553 in words is "twenty-six billion, eight hundred forty-four million, three hundred ninety-nine thousand, five hundred fifty-three".