26691275551 has 2 divisors, whose sum is σ = 26691275552. Its totient is φ = 26691275550.

The previous prime is 26691275489. The next prime is 26691275581. The reversal of 26691275551 is 15557219662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26691275551 - 2⁷ = 26691275423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26691275495 and 26691275504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26691275581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13345637775 + 13345637776.

It is an arithmetic number, because the mean of its divisors is an integer number (13345637776).

Almost surely, 2^26691275551 is an apocalyptic number.

26691275551 is a deficient number, since it is larger than the sum of its proper divisors (1).

26691275551 is an equidigital number, since it uses as much as digits as its factorization.

26691275551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134000, while the sum is 49.

The spelling of 26691275551 in words is "twenty-six billion, six hundred ninety-one million, two hundred seventy-five thousand, five hundred fifty-one".