16430638849 has 4 divisors (see below), whose sum is σ = 16831386180. Its totient is φ = 16029891520.

The previous prime is 16430638793. The next prime is 16430638859. The reversal of 16430638849 is 94883603461.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6243370225 + 10187268624 = 79015^2 + 100932^2 .

It is a cyclic number.

It is not a de Polignac number, because 16430638849 - 2²¹ = 16428541697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16430638796 and 16430638805.

It is not an unprimeable number, because it can be changed into a prime (16430638859) 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, 200373604 + ... + 200373685.

It is an arithmetic number, because the mean of its divisors is an integer number (4207846545).

Almost surely, 2^16430638849 is an apocalyptic number.

It is an amenable number.

16430638849 is a deficient number, since it is larger than the sum of its proper divisors (400747331).

16430638849 is an equidigital number, since it uses as much as digits as its factorization.

16430638849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400747330.

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 16430638849 in words is "sixteen billion, four hundred thirty million, six hundred thirty-eight thousand, eight hundred forty-nine".