16424972857 has 4 divisors (see below), whose sum is σ = 16425500800. Its totient is φ = 16424444916.

The previous prime is 16424972801. The next prime is 16424972891. The reversal of 16424972857 is 75827942461.

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.

It is a cyclic number.

It is not a de Polignac number, because 16424972857 - 2¹⁹ = 16424448569 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16424972798 and 16424972807.

It is not an unprimeable number, because it can be changed into a prime (16424972657) 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, 214173 + ... + 280570.

It is an arithmetic number, because the mean of its divisors is an integer number (4106375200).

Almost surely, 2^16424972857 is an apocalyptic number.

It is an amenable number.

16424972857 is a deficient number, since it is larger than the sum of its proper divisors (527943).

16424972857 is an equidigital number, since it uses as much as digits as its factorization.

16424972857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527942.

The product of its digits is 6773760, while the sum is 55.

The spelling of 16424972857 in words is "sixteen billion, four hundred twenty-four million, nine hundred seventy-two thousand, eight hundred fifty-seven".