26866047519 has 20 divisors (see below), whose sum is σ = 42245509240. Its totient is φ = 16968029040.

The previous prime is 26866047511. The next prime is 26866047547. The reversal of 26866047519 is 91574066862.

26866047519 is a `hidden beast` number, since 2 + 6 + 86 + 6 + 0 + 47 + 519 = 666.

It is not a de Polignac number, because 26866047519 - 2³ = 26866047511 is a prime.

It is a super-2 number, since 2×26866047519² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26866047511) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8726872 + ... + 8729949.

It is an arithmetic number, because the mean of its divisors is an integer number (2112275462).

Almost surely, 2^26866047519 is an apocalyptic number.

26866047519 is a deficient number, since it is larger than the sum of its proper divisors (15379461721).

26866047519 is a wasteful number, since it uses less digits than its factorization.

26866047519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17456852 (or 17456843 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 26866047519 in words is "twenty-six billion, eight hundred sixty-six million, forty-seven thousand, five hundred nineteen".