26806204531 has 2 divisors, whose sum is σ = 26806204532. Its totient is φ = 26806204530.

The previous prime is 26806204493. The next prime is 26806204543. The reversal of 26806204531 is 13540260862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26806204531 - 2²³ = 26797815923 is a prime.

It is a super-2 number, since 2×26806204531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26806204561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13403102265 + 13403102266.

It is an arithmetic number, because the mean of its divisors is an integer number (13403102266).

Almost surely, 2^26806204531 is an apocalyptic number.

26806204531 is a deficient number, since it is larger than the sum of its proper divisors (1).

26806204531 is an equidigital number, since it uses as much as digits as its factorization.

26806204531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 26806204531 in words is "twenty-six billion, eight hundred six million, two hundred four thousand, five hundred thirty-one".