26663435061551 has 2 divisors, whose sum is σ = 26663435061552. Its totient is φ = 26663435061550.

The previous prime is 26663435061541. The next prime is 26663435061559. The reversal of 26663435061551 is 15516053436662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26663435061551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26663435061493 and 26663435061502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26663435061559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13331717530775 + 13331717530776.

It is an arithmetic number, because the mean of its divisors is an integer number (13331717530776).

Almost surely, 2^{26663435061551} is an apocalyptic number.

26663435061551 is a deficient number, since it is larger than the sum of its proper divisors (1).

26663435061551 is an equidigital number, since it uses as much as digits as its factorization.

26663435061551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664000, while the sum is 53.

The spelling of 26663435061551 in words is "twenty-six trillion, six hundred sixty-three billion, four hundred thirty-five million, sixty-one thousand, five hundred fifty-one".