16420115409 has 16 divisors (see below), whose sum is σ = 22060304640. Its totient is φ = 10863386240.

The previous prime is 16420115323. The next prime is 16420115417. The reversal of 16420115409 is 90451102461.

It is a cyclic number.

It is not a de Polignac number, because 16420115409 - 2¹¹ = 16420113361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16420115409.

It is not an unprimeable number, because it can be changed into a prime (16420115429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2356072 + ... + 2363030.

It is an arithmetic number, because the mean of its divisors is an integer number (1378769040).

Almost surely, 2^16420115409 is an apocalyptic number.

It is an amenable number.

16420115409 is a deficient number, since it is larger than the sum of its proper divisors (5640189231).

16420115409 is a wasteful number, since it uses less digits than its factorization.

16420115409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12840.

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 16420115409 in words is "sixteen billion, four hundred twenty million, one hundred fifteen thousand, four hundred nine".