16550973393 has 4 divisors (see below), whose sum is σ = 22067964528. Its totient is φ = 11033982260.

The previous prime is 16550973391. The next prime is 16550973403. The reversal of 16550973393 is 39337905561.

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 16550973393 - 2¹ = 16550973391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16550973391) 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, 2758495563 + ... + 2758495568.

It is an arithmetic number, because the mean of its divisors is an integer number (5516991132).

Almost surely, 2^16550973393 is an apocalyptic number.

It is an amenable number.

16550973393 is a deficient number, since it is larger than the sum of its proper divisors (5516991135).

16550973393 is an equidigital number, since it uses as much as digits as its factorization.

16550973393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5516991134.

The product of its (nonzero) digits is 2296350, while the sum is 51.

The spelling of 16550973393 in words is "sixteen billion, five hundred fifty million, nine hundred seventy-three thousand, three hundred ninety-three".