26321538553 has 2 divisors, whose sum is σ = 26321538554. Its totient is φ = 26321538552.

The previous prime is 26321538541. The next prime is 26321538557. The reversal of 26321538553 is 35583512362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19175879529 + 7145659024 = 138477^2 + 84532^2 .

It is a cyclic number.

It is not a de Polignac number, because 26321538553 - 2⁹ = 26321538041 is a prime.

It is not a weakly prime, because it can be changed into another prime (26321538557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13160769276 + 13160769277.

It is an arithmetic number, because the mean of its divisors is an integer number (13160769277).

Almost surely, 2^26321538553 is an apocalyptic number.

It is an amenable number.

26321538553 is a deficient number, since it is larger than the sum of its proper divisors (1).

26321538553 is an equidigital number, since it uses as much as digits as its factorization.

26321538553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648000, while the sum is 43.

The spelling of 26321538553 in words is "twenty-six billion, three hundred twenty-one million, five hundred thirty-eight thousand, five hundred fifty-three".