16687776825457 has 8 divisors (see below), whose sum is σ = 16702404489792. Its totient is φ = 16673150005200.

The previous prime is 16687776825403. The next prime is 16687776825491. The reversal of 16687776825457 is 75452867778661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16687776825457 - 2⁴³ = 7891683803249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16687776825857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43258138 + ... + 43642204.

It is an arithmetic number, because the mean of its divisors is an integer number (2087800561224).

Almost surely, 2^{16687776825457} is an apocalyptic number.

It is an amenable number.

16687776825457 is a deficient number, since it is larger than the sum of its proper divisors (14627664335).

16687776825457 is a wasteful number, since it uses less digits than its factorization.

16687776825457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422039.

The product of its digits is 6638284800, while the sum is 79.

The spelling of 16687776825457 in words is "sixteen trillion, six hundred eighty-seven billion, seven hundred seventy-six million, eight hundred twenty-five thousand, four hundred fifty-seven".