16779587856 has 40 divisors (see below), whose sum is σ = 43414346304. Its totient is φ = 5584540800.

The previous prime is 16779587827. The next prime is 16779587879. The reversal of 16779587856 is 65878597761.

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, 239095 + ... + 301206.

Almost surely, 2^16779587856 is an apocalyptic number.

16779587856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16779587856 is an abundant number, since it is smaller than the sum of its proper divisors (26634758448).

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

16779587856 is a wasteful number, since it uses less digits than its factorization.

16779587856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540959 (or 540953 counting only the distinct ones).

The product of its digits is 177811200, while the sum is 69.

The spelling of 16779587856 in words is "sixteen billion, seven hundred seventy-nine million, five hundred eighty-seven thousand, eight hundred fifty-six".