16745166449 has 4 divisors (see below), whose sum is σ = 18267454320. Its totient is φ = 15222878580.

The previous prime is 16745166437. The next prime is 16745166463. The reversal of 16745166449 is 94466154761.

It is a happy number.

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 16745166449 - 2¹⁶ = 16745100913 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 16745166449.

It is not an unprimeable number, because it can be changed into a prime (16745166499) 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, 761143919 + ... + 761143940.

It is an arithmetic number, because the mean of its divisors is an integer number (4566863580).

Almost surely, 2^16745166449 is an apocalyptic number.

It is an amenable number.

16745166449 is a deficient number, since it is larger than the sum of its proper divisors (1522287871).

16745166449 is a wasteful number, since it uses less digits than its factorization.

16745166449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522287870.

The product of its digits is 4354560, while the sum is 53.

The spelling of 16745166449 in words is "sixteen billion, seven hundred forty-five million, one hundred sixty-six thousand, four hundred forty-nine".