26979586553 has 2 divisors, whose sum is σ = 26979586554. Its totient is φ = 26979586552.

The previous prime is 26979586549. The next prime is 26979586573. The reversal of 26979586553 is 35568597962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26651542009 + 328044544 = 163253^2 + 18112^2 .

It is a cyclic number.

It is not a de Polignac number, because 26979586553 - 2² = 26979586549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26979586553.

It is not a weakly prime, because it can be changed into another prime (26979586573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13489793276 + 13489793277.

It is an arithmetic number, because the mean of its divisors is an integer number (13489793277).

Almost surely, 2^26979586553 is an apocalyptic number.

It is an amenable number.

26979586553 is a deficient number, since it is larger than the sum of its proper divisors (1).

26979586553 is an equidigital number, since it uses as much as digits as its factorization.

26979586553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472000, while the sum is 65.

The spelling of 26979586553 in words is "twenty-six billion, nine hundred seventy-nine million, five hundred eighty-six thousand, five hundred fifty-three".