26944402191 has 48 divisors (see below), whose sum is σ = 43486377984. Its totient is φ = 14784684096.

The previous prime is 26944402123. The next prime is 26944402211. The reversal of 26944402191 is 19120444962.

It is not a de Polignac number, because 26944402191 - 2²⁷ = 26810184463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26944402291) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 329386 + ... + 402968.

It is an arithmetic number, because the mean of its divisors is an integer number (905966208).

Almost surely, 2^26944402191 is an apocalyptic number.

26944402191 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

26944402191 is a deficient number, since it is larger than the sum of its proper divisors (16541975793).

26944402191 is a wasteful number, since it uses less digits than its factorization.

26944402191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73700 (or 73693 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 26944402191 in words is "twenty-six billion, nine hundred forty-four million, four hundred two thousand, one hundred ninety-one".