16557773069409 has 32 divisors (see below), whose sum is σ = 25937498861568. Its totient is φ = 9262787208000.

The previous prime is 16557773069381. The next prime is 16557773069447. The reversal of 16557773069409 is 90496037775561.

It is not a de Polignac number, because 16557773069409 - 2⁹ = 16557773068897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16557773069449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12851974 + ... + 14081504.

It is an arithmetic number, because the mean of its divisors is an integer number (810546839424).

Almost surely, 2^{16557773069409} is an apocalyptic number.

It is an amenable number.

16557773069409 is a deficient number, since it is larger than the sum of its proper divisors (9379725792159).

16557773069409 is a wasteful number, since it uses less digits than its factorization.

16557773069409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260949.

The product of its (nonzero) digits is 300056400, while the sum is 69.

The spelling of 16557773069409 in words is "sixteen trillion, five hundred fifty-seven billion, seven hundred seventy-three million, sixty-nine thousand, four hundred nine".