16366137431 has 4 divisors (see below), whose sum is σ = 18704157072. Its totient is φ = 14028117792.

The previous prime is 16366137419. The next prime is 16366137433. The reversal of 16366137431 is 13473166361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13473166361 = 19 ⋅709114019.

It is a cyclic number.

It is not a de Polignac number, because 16366137431 - 2¹⁸ = 16365875287 is a prime.

It is a super-2 number, since 2×16366137431² (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 (16366137433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1169009810 + ... + 1169009823.

It is an arithmetic number, because the mean of its divisors is an integer number (4676039268).

Almost surely, 2^16366137431 is an apocalyptic number.

16366137431 is a deficient number, since it is larger than the sum of its proper divisors (2338019641).

16366137431 is an equidigital number, since it uses as much as digits as its factorization.

16366137431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338019640.

The product of its digits is 163296, while the sum is 41.

The spelling of 16366137431 in words is "sixteen billion, three hundred sixty-six million, one hundred thirty-seven thousand, four hundred thirty-one".