16424972891 has 2 divisors, whose sum is σ = 16424972892. Its totient is φ = 16424972890.

The previous prime is 16424972801. The next prime is 16424972989. The reversal of 16424972891 is 19827942461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16424972891 - 2²² = 16420778587 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (16424972801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8212486445 + 8212486446.

It is an arithmetic number, because the mean of its divisors is an integer number (8212486446).

Almost surely, 2^16424972891 is an apocalyptic number.

16424972891 is a deficient number, since it is larger than the sum of its proper divisors (1).

16424972891 is an equidigital number, since it uses as much as digits as its factorization.

16424972891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 53.

The spelling of 16424972891 in words is "sixteen billion, four hundred twenty-four million, nine hundred seventy-two thousand, eight hundred ninety-one".