26405287603 has 2 divisors, whose sum is σ = 26405287604. Its totient is φ = 26405287602.

The previous prime is 26405287537. The next prime is 26405287661. The reversal of 26405287603 is 30678250462.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26405287603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26405287603.

It is not a weakly prime, because it can be changed into another prime (26405287693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13202643801 + 13202643802.

It is an arithmetic number, because the mean of its divisors is an integer number (13202643802).

Almost surely, 2^26405287603 is an apocalyptic number.

26405287603 is a deficient number, since it is larger than the sum of its proper divisors (1).

26405287603 is an equidigital number, since it uses as much as digits as its factorization.

26405287603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 26405287603 in words is "twenty-six billion, four hundred five million, two hundred eighty-seven thousand, six hundred three".