16129843493 has 4 divisors (see below), whose sum is σ = 16131317280. Its totient is φ = 16128369708.

The previous prime is 16129843459. The next prime is 16129843501. The reversal of 16129843493 is 39434892161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39434892161 = 7 ⋅5633556023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16129843493 is a prime.

It is a super-2 number, since 2×16129843493² (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 (16129843193) 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, 720353 + ... + 742406.

It is an arithmetic number, because the mean of its divisors is an integer number (4032829320).

Almost surely, 2^16129843493 is an apocalyptic number.

It is an amenable number.

16129843493 is a deficient number, since it is larger than the sum of its proper divisors (1473787).

16129843493 is a wasteful number, since it uses less digits than its factorization.

16129843493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473786.

The product of its digits is 1119744, while the sum is 50.

The spelling of 16129843493 in words is "sixteen billion, one hundred twenty-nine million, eight hundred forty-three thousand, four hundred ninety-three".