26550990918 has 64 divisors (see below), whose sum is σ = 60936099840. Its totient is φ = 8560533600.

The previous prime is 26550990901. The next prime is 26550990959. The reversal of 26550990918 is 81909905562.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 6488053 + ... + 6492143.

It is an arithmetic number, because the mean of its divisors is an integer number (952126560).

Almost surely, 2^26550990918 is an apocalyptic number.

26550990918 is an abundant number, since it is smaller than the sum of its proper divisors (34385108922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26550990918 is a wasteful number, since it uses less digits than its factorization.

26550990918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8010 (or 8004 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The spelling of 26550990918 in words is "twenty-six billion, five hundred fifty million, nine hundred ninety thousand, nine hundred eighteen".