26891419863 has 32 divisors (see below), whose sum is σ = 45614937600. Its totient is φ = 13969562880.

The previous prime is 26891419829. The next prime is 26891419897. The reversal of 26891419863 is 36891419862.

It is an interprime number because it is at equal distance from previous prime (26891419829) and next prime (26891419897).

It is not a de Polignac number, because 26891419863 - 2⁶ = 26891419799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26891429863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1176570 + ... + 1199207.

It is an arithmetic number, because the mean of its divisors is an integer number (1425466800).

Almost surely, 2^26891419863 is an apocalyptic number.

26891419863 is a deficient number, since it is larger than the sum of its proper divisors (18723517737).

26891419863 is a wasteful number, since it uses less digits than its factorization.

26891419863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375812 (or 2375798 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 57.

Subtracting 26891419863 from its reverse (36891419862), we obtain a palindrome (9999999999).

The spelling of 26891419863 in words is "twenty-six billion, eight hundred ninety-one million, four hundred nineteen thousand, eight hundred sixty-three".