13766344991 has 8 divisors (see below), whose sum is σ = 15791023104. Its totient is φ = 11756181240.

The previous prime is 13766344981. The next prime is 13766345003. The reversal of 13766344991 is 19944366731.

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

It is a cyclic number.

It is not a de Polignac number, because 13766344991 - 2¹⁴ = 13766328607 is a prime.

It is a super-2 number, since 2×13766344991² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13766344981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3626555 + ... + 3630348.

It is an arithmetic number, because the mean of its divisors is an integer number (1973877888).

Almost surely, 2^13766344991 is an apocalyptic number.

13766344991 is a deficient number, since it is larger than the sum of its proper divisors (2024678113).

13766344991 is an equidigital number, since it uses as much as digits as its factorization.

13766344991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7257181.

The product of its digits is 2939328, while the sum is 53.

The spelling of 13766344991 in words is "thirteen billion, seven hundred sixty-six million, three hundred forty-four thousand, nine hundred ninety-one".