13426188721 has 8 divisors (see below), whose sum is σ = 14987373984. Its totient is φ = 11921773920.

The previous prime is 13426188653. The next prime is 13426188731. The reversal of 13426188721 is 12788162431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13426188721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (13426188731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14192116 + ... + 14193061.

It is an arithmetic number, because the mean of its divisors is an integer number (1873421748).

Almost surely, 2^13426188721 is an apocalyptic number.

13426188721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13426188721 is a deficient number, since it is larger than the sum of its proper divisors (1561185263).

13426188721 is a wasteful number, since it uses less digits than its factorization.

13426188721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28385231.

The product of its digits is 129024, while the sum is 43.

The spelling of 13426188721 in words is "thirteen billion, four hundred twenty-six million, one hundred eighty-eight thousand, seven hundred twenty-one".