16687776825456 has 80 divisors (see below), whose sum is σ = 47179442703360. Its totient is φ = 5040745781760.

The previous prime is 16687776825403. The next prime is 16687776825491. The reversal of 16687776825456 is 65452867778661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50322976 + ... + 50653503.

It is an arithmetic number, because the mean of its divisors is an integer number (589743033792).

Almost surely, 2^{16687776825456} is an apocalyptic number.

16687776825456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16687776825456 is an abundant number, since it is smaller than the sum of its proper divisors (30491665877904).

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

16687776825456 is a wasteful number, since it uses less digits than its factorization.

16687776825456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100976814 (or 100976808 counting only the distinct ones).

The product of its digits is 5689958400, while the sum is 78.

The spelling of 16687776825456 in words is "sixteen trillion, six hundred eighty-seven billion, seven hundred seventy-six million, eight hundred twenty-five thousand, four hundred fifty-six".