26685649 has 2 divisors, whose sum is σ = 26685650. Its totient is φ = 26685648.

The previous prime is 26685643. The next prime is 26685653. The reversal of 26685649 is 94658662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22657600 + 4028049 = 4760^2 + 2007^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26685649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26685599 and 26685608.

It is not a weakly prime, because it can be changed into another prime (26685643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13342824 + 13342825.

It is an arithmetic number, because the mean of its divisors is an integer number (13342825).

Almost surely, 2^26685649 is an apocalyptic number.

It is an amenable number.

26685649 is a deficient number, since it is larger than the sum of its proper divisors (1).

26685649 is an equidigital number, since it uses as much as digits as its factorization.

26685649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 46.

The square root of 26685649 is about 5165.8154244998. The cubic root of 26685649 is about 298.8311892221.

The spelling of 26685649 in words is "twenty-six million, six hundred eighty-five thousand, six hundred forty-nine".