16729819181431 has 4 divisors (see below), whose sum is σ = 16729847361864. Its totient is φ = 16729791001000.

The previous prime is 16729819181377. The next prime is 16729819181461. The reversal of 16729819181431 is 13418191892761.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16729819181431 - 2⁷ = 16729819181303 is a prime.

It is a super-2 number, since 2×16729819181431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16729819181431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16729819181461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13180120 + ... + 14393581.

It is an arithmetic number, because the mean of its divisors is an integer number (4182461840466).

Almost surely, 2^{16729819181431} is an apocalyptic number.

16729819181431 is a deficient number, since it is larger than the sum of its proper divisors (28180433).

16729819181431 is an equidigital number, since it uses as much as digits as its factorization.

16729819181431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28180432.

The product of its digits is 5225472, while the sum is 61.

The spelling of 16729819181431 in words is "sixteen trillion, seven hundred twenty-nine billion, eight hundred nineteen million, one hundred eighty-one thousand, four hundred thirty-one".