26949443880 has 64 divisors (see below), whose sum is σ = 80860991040. Its totient is φ = 7185393152.

The previous prime is 26949443863. The next prime is 26949443887. The reversal of 26949443880 is 8834494962.

It is a self number, because there is not a number n which added to its sum of digits gives 26949443880.

It is not an unprimeable number, because it can be changed into a prime (26949443887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 993052 + ... + 1019828.

It is an arithmetic number, because the mean of its divisors is an integer number (1263452985).

Almost surely, 2^26949443880 is an apocalyptic number.

26949443880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26949443880 is an abundant number, since it is smaller than the sum of its proper divisors (53911547160).

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

26949443880 is a wasteful number, since it uses less digits than its factorization.

26949443880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35178 (or 35174 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 57.

The spelling of 26949443880 in words is "twenty-six billion, nine hundred forty-nine million, four hundred forty-three thousand, eight hundred eighty".