16545055993 has 4 divisors (see below), whose sum is σ = 16646559568. Its totient is φ = 16443552420.

The previous prime is 16545055981. The next prime is 16545056009. The reversal of 16545055993 is 39955054561.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39955054561 = 147347 ⋅271163.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16545055993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16545055993.

It is not an unprimeable number, because it can be changed into a prime (16545055903) 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, 50751543 + ... + 50751868.

It is an arithmetic number, because the mean of its divisors is an integer number (4161639892).

Almost surely, 2^16545055993 is an apocalyptic number.

It is an amenable number.

16545055993 is a deficient number, since it is larger than the sum of its proper divisors (101503575).

16545055993 is a wasteful number, since it uses less digits than its factorization.

16545055993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101503574.

The product of its (nonzero) digits is 3645000, while the sum is 52.

The spelling of 16545055993 in words is "sixteen billion, five hundred forty-five million, fifty-five thousand, nine hundred ninety-three".