26503385971 has 2 divisors, whose sum is σ = 26503385972. Its totient is φ = 26503385970.

The previous prime is 26503385933. The next prime is 26503385989. The reversal of 26503385971 is 17958330562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26503385971 - 2¹⁵ = 26503353203 is a prime.

It is a super-2 number, since 2×26503385971² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26503385371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13251692985 + 13251692986.

It is an arithmetic number, because the mean of its divisors is an integer number (13251692986).

Almost surely, 2^26503385971 is an apocalyptic number.

26503385971 is a deficient number, since it is larger than the sum of its proper divisors (1).

26503385971 is an equidigital number, since it uses as much as digits as its factorization.

26503385971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 26503385971 in words is "twenty-six billion, five hundred three million, three hundred eighty-five thousand, nine hundred seventy-one".