16573739944 has 16 divisors (see below), whose sum is σ = 31247454420. Its totient is φ = 8241085440.

The previous prime is 16573739927. The next prime is 16573739953. The reversal of 16573739944 is 44993737561.

It can be written as a sum of positive squares in 2 ways, for example, as 14868875844 + 1704864100 = 121938^2 + 41290^2 .

It is a super-2 number, since 2×16573739944² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5721529 + ... + 5724424.

Almost surely, 2^16573739944 is an apocalyptic number.

It is an amenable number.

16573739944 is a deficient number, since it is larger than the sum of its proper divisors (14673714476).

16573739944 is a wasteful number, since it uses less digits than its factorization.

16573739944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11446140 (or 11446136 counting only the distinct ones).

The product of its digits is 17146080, while the sum is 58.

The spelling of 16573739944 in words is "sixteen billion, five hundred seventy-three million, seven hundred thirty-nine thousand, nine hundred forty-four".