16577440499 has 4 divisors (see below), whose sum is σ = 16594946664. Its totient is φ = 16559934336.

The previous prime is 16577440471. The next prime is 16577440513. The reversal of 16577440499 is 99404477561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16577440499 - 2²⁸ = 16309005043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16577440409) 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, 8751662 + ... + 8753555.

It is an arithmetic number, because the mean of its divisors is an integer number (4148736666).

Almost surely, 2^16577440499 is an apocalyptic number.

16577440499 is a deficient number, since it is larger than the sum of its proper divisors (17506165).

16577440499 is an equidigital number, since it uses as much as digits as its factorization.

16577440499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17506164.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 16577440499 in words is "sixteen billion, five hundred seventy-seven million, four hundred forty thousand, four hundred ninety-nine".