26264023661 has 2 divisors, whose sum is σ = 26264023662. Its totient is φ = 26264023660.

The previous prime is 26264023657. The next prime is 26264023697. The reversal of 26264023661 is 16632046262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21706423561 + 4557600100 = 147331^2 + 67510^2 .

It is a cyclic number.

It is not a de Polignac number, because 26264023661 - 2² = 26264023657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26264023561) 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, 13132011830 + 13132011831.

It is an arithmetic number, because the mean of its divisors is an integer number (13132011831).

Almost surely, 2^26264023661 is an apocalyptic number.

It is an amenable number.

26264023661 is a deficient number, since it is larger than the sum of its proper divisors (1).

26264023661 is an equidigital number, since it uses as much as digits as its factorization.

26264023661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 26264023661 in words is "twenty-six billion, two hundred sixty-four million, twenty-three thousand, six hundred sixty-one".