16628943154 has 4 divisors (see below), whose sum is σ = 24943414734. Its totient is φ = 8314471576.

The previous prime is 16628943143. The next prime is 16628943197. The reversal of 16628943154 is 45134982661.

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

It can be written as a sum of positive squares in only one way, i.e., 12856158225 + 3772784929 = 113385^2 + 61423^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 16628943098 and 16628943107.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4157235787 + ... + 4157235790.

Almost surely, 2^16628943154 is an apocalyptic number.

16628943154 is a deficient number, since it is larger than the sum of its proper divisors (8314471580).

16628943154 is an equidigital number, since it uses as much as digits as its factorization.

16628943154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8314471579.

The product of its digits is 1244160, while the sum is 49.

The spelling of 16628943154 in words is "sixteen billion, six hundred twenty-eight million, nine hundred forty-three thousand, one hundred fifty-four".