16573739943 has 16 divisors (see below), whose sum is σ = 23452540416. Its totient is φ = 10375067520.

The previous prime is 16573739927. The next prime is 16573739953. The reversal of 16573739943 is 34993737561.

It is a happy number.

It is not a de Polignac number, because 16573739943 - 2⁴ = 16573739927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16573739953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355021 + ... + 398982.

It is an arithmetic number, because the mean of its divisors is an integer number (1465783776).

Almost surely, 2^16573739943 is an apocalyptic number.

16573739943 is a deficient number, since it is larger than the sum of its proper divisors (6878800473).

16573739943 is a wasteful number, since it uses less digits than its factorization.

16573739943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754454.

The product of its digits is 12859560, while the sum is 57.

The spelling of 16573739943 in words is "sixteen billion, five hundred seventy-three million, seven hundred thirty-nine thousand, nine hundred forty-three".