14165711991 has 12 divisors (see below), whose sum is σ = 21538509720. Its totient is φ = 8946765360.

The previous prime is 14165711947. The next prime is 14165712031. The reversal of 14165711991 is 19911756141.

It is a happy number.

It is not a de Polignac number, because 14165711991 - 2¹⁸ = 14165449847 is a prime.

It is a super-2 number, since 2×14165711991² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14165716991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41420040 + ... + 41420381.

It is an arithmetic number, because the mean of its divisors is an integer number (1794875810).

Almost surely, 2^14165711991 is an apocalyptic number.

14165711991 is a deficient number, since it is larger than the sum of its proper divisors (7372797729).

14165711991 is a wasteful number, since it uses less digits than its factorization.

14165711991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82840446 (or 82840443 counting only the distinct ones).

The product of its digits is 68040, while the sum is 45.

The spelling of 14165711991 in words is "fourteen billion, one hundred sixty-five million, seven hundred eleven thousand, nine hundred ninety-one".