26490768717 has 48 divisors (see below), whose sum is σ = 41980414272. Its totient is φ = 14811310080.

The previous prime is 26490768709. The next prime is 26490768769. The reversal of 26490768717 is 71786709462.

It is not a de Polignac number, because 26490768717 - 2³ = 26490768709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26490768797) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1722978 + ... + 1738284.

It is an arithmetic number, because the mean of its divisors is an integer number (874591964).

Almost surely, 2^26490768717 is an apocalyptic number.

It is an amenable number.

26490768717 is a deficient number, since it is larger than the sum of its proper divisors (15489645555).

26490768717 is a wasteful number, since it uses less digits than its factorization.

26490768717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15578 (or 15571 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 57.

The spelling of 26490768717 in words is "twenty-six billion, four hundred ninety million, seven hundred sixty-eight thousand, seven hundred seventeen".