26506727021 has 2 divisors, whose sum is σ = 26506727022. Its totient is φ = 26506727020.

The previous prime is 26506727011. The next prime is 26506727033. The reversal of 26506727021 is 12072760562.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26271871396 + 234855625 = 162086^2 + 15325^2 .

It is a cyclic number.

It is not a de Polignac number, because 26506727021 - 2⁶ = 26506726957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26506727011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13253363510 + 13253363511.

It is an arithmetic number, because the mean of its divisors is an integer number (13253363511).

Almost surely, 2^26506727021 is an apocalyptic number.

It is an amenable number.

26506727021 is a deficient number, since it is larger than the sum of its proper divisors (1).

26506727021 is an equidigital number, since it uses as much as digits as its factorization.

26506727021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 26506727021 in words is "twenty-six billion, five hundred six million, seven hundred twenty-seven thousand, twenty-one".