26497653971 has 2 divisors, whose sum is σ = 26497653972. Its totient is φ = 26497653970.

The previous prime is 26497653943. The next prime is 26497653977. The reversal of 26497653971 is 17935679462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26497653971 - 2¹⁸ = 26497391827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26497653971.

It is not a weakly prime, because it can be changed into another prime (26497653977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13248826985 + 13248826986.

It is an arithmetic number, because the mean of its divisors is an integer number (13248826986).

Almost surely, 2^26497653971 is an apocalyptic number.

26497653971 is a deficient number, since it is larger than the sum of its proper divisors (1).

26497653971 is an equidigital number, since it uses as much as digits as its factorization.

26497653971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17146080, while the sum is 59.

The spelling of 26497653971 in words is "twenty-six billion, four hundred ninety-seven million, six hundred fifty-three thousand, nine hundred seventy-one".