16624663458745 has 4 divisors (see below), whose sum is σ = 19949596150500. Its totient is φ = 13299730766992.

The previous prime is 16624663458743. The next prime is 16624663458763. The reversal of 16624663458745 is 54785436642661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12332486391696 + 4292177067049 = 3511764^2 + 2071757^2 .

It is a cyclic number.

It is not a de Polignac number, because 16624663458745 - 2¹ = 16624663458743 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (16624663458743) 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, 1662466345870 + ... + 1662466345879.

It is an arithmetic number, because the mean of its divisors is an integer number (4987399037625).

Almost surely, 2^{16624663458745} is an apocalyptic number.

It is an amenable number.

16624663458745 is a deficient number, since it is larger than the sum of its proper divisors (3324932691755).

16624663458745 is an equidigital number, since it uses as much as digits as its factorization.

16624663458745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324932691754.

The product of its digits is 696729600, while the sum is 67.

The spelling of 16624663458745 in words is "sixteen trillion, six hundred twenty-four billion, six hundred sixty-three million, four hundred fifty-eight thousand, seven hundred forty-five".