26406726457 has 2 divisors, whose sum is σ = 26406726458. Its totient is φ = 26406726456.

The previous prime is 26406726449. The next prime is 26406726499. The reversal of 26406726457 is 75462760462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24767205376 + 1639521081 = 157376^2 + 40491^2 .

It is a cyclic number.

It is not a de Polignac number, because 26406726457 - 2³ = 26406726449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26406726457.

It is not a weakly prime, because it can be changed into another prime (26406726427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13203363228 + 13203363229.

It is an arithmetic number, because the mean of its divisors is an integer number (13203363229).

Almost surely, 2^26406726457 is an apocalyptic number.

It is an amenable number.

26406726457 is a deficient number, since it is larger than the sum of its proper divisors (1).

26406726457 is an equidigital number, since it uses as much as digits as its factorization.

26406726457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3386880, while the sum is 49.

It can be divided in two parts, 2640672 and 6457, that added together give a square (2647129 = 1627²).

The spelling of 26406726457 in words is "twenty-six billion, four hundred six million, seven hundred twenty-six thousand, four hundred fifty-seven".