16628737747 has 4 divisors (see below), whose sum is σ = 16629186376. Its totient is φ = 16628289120.

The previous prime is 16628737693. The next prime is 16628737751. The reversal of 16628737747 is 74773782661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74773782661 = 2267 ⋅32983583.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16628737747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16628737691 and 16628737700.

It is not an unprimeable number, because it can be changed into a prime (16628737787) 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, 163158 + ... + 244699.

It is an arithmetic number, because the mean of its divisors is an integer number (4157296594).

Almost surely, 2^16628737747 is an apocalyptic number.

16628737747 is a deficient number, since it is larger than the sum of its proper divisors (448629).

16628737747 is an equidigital number, since it uses as much as digits as its factorization.

16628737747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448628.

The product of its digits is 16595712, while the sum is 58.

The spelling of 16628737747 in words is "sixteen billion, six hundred twenty-eight million, seven hundred thirty-seven thousand, seven hundred forty-seven".