16779644336 has 40 divisors (see below), whose sum is σ = 40013001504. Its totient is φ = 6638100480.

The previous prime is 16779644311. The next prime is 16779644359. The reversal of 16779644336 is 63344697761.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5760785 + ... + 5763696.

Almost surely, 2^16779644336 is an apocalyptic number.

16779644336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16779644336 is an abundant number, since it is smaller than the sum of its proper divisors (23233357168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16779644336 is a wasteful number, since it uses less digits than its factorization.

16779644336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11524509 (or 11524503 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 56.

The spelling of 16779644336 in words is "sixteen billion, seven hundred seventy-nine million, six hundred forty-four thousand, three hundred thirty-six".