16685113108551 has 8 divisors (see below), whose sum is σ = 22270560083184. Its totient is φ = 11111537436480.

The previous prime is 16685113108541. The next prime is 16685113108567. The reversal of 16685113108551 is 15580131158661.

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

It is not a de Polignac number, because 16685113108551 - 2¹⁵ = 16685113075783 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16685113108494 and 16685113108503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16685113108541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2967822360 + ... + 2967827981.

It is an arithmetic number, because the mean of its divisors is an integer number (2783820010398).

Almost surely, 2^{16685113108551} is an apocalyptic number.

16685113108551 is a deficient number, since it is larger than the sum of its proper divisors (5585446974633).

16685113108551 is an equidigital number, since it uses as much as digits as its factorization.

16685113108551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5935651281.

The product of its (nonzero) digits is 864000, while the sum is 51.

The spelling of 16685113108551 in words is "sixteen trillion, six hundred eighty-five billion, one hundred thirteen million, one hundred eight thousand, five hundred fifty-one".