26550991489 has 4 divisors (see below), whose sum is σ = 28964718000. Its totient is φ = 24137264980.

The previous prime is 26550991487. The next prime is 26550991501. The reversal of 26550991489 is 98419905562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26550991489 - 2¹ = 26550991487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26550991487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1206863239 + ... + 1206863260.

It is an arithmetic number, because the mean of its divisors is an integer number (7241179500).

Almost surely, 2^26550991489 is an apocalyptic number.

It is an amenable number.

26550991489 is a deficient number, since it is larger than the sum of its proper divisors (2413726511).

26550991489 is a wasteful number, since it uses less digits than its factorization.

26550991489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413726510.

The product of its (nonzero) digits is 6998400, while the sum is 58.

The spelling of 26550991489 in words is "twenty-six billion, five hundred fifty million, nine hundred ninety-one thousand, four hundred eighty-nine".