16888979474 has 4 divisors (see below), whose sum is σ = 25333469214. Its totient is φ = 8444489736.

The previous prime is 16888979453. The next prime is 16888979491. The reversal of 16888979474 is 47497988861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47497988861 = 293 ⋅162109177.

It can be written as a sum of positive squares in only one way, i.e., 14290528849 + 2598450625 = 119543^2 + 50975^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16888979398 and 16888979407.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4222244867 + ... + 4222244870.

Almost surely, 2^16888979474 is an apocalyptic number.

16888979474 is a deficient number, since it is larger than the sum of its proper divisors (8444489740).

16888979474 is an equidigital number, since it uses as much as digits as its factorization.

16888979474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8444489739.

The product of its digits is 195084288, while the sum is 71.

The spelling of 16888979474 in words is "sixteen billion, eight hundred eighty-eight million, nine hundred seventy-nine thousand, four hundred seventy-four".