16778450085 has 8 divisors (see below), whose sum is σ = 26845520160. Its totient is φ = 8948506704.

The previous prime is 16778450063. The next prime is 16778450093. The reversal of 16778450085 is 58005487761.

It is a happy number.

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

It is not a de Polignac number, because 16778450085 - 2⁷ = 16778449957 is a prime.

It is a congruent number.

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, 559281655 + ... + 559281684.

It is an arithmetic number, because the mean of its divisors is an integer number (3355690020).

Almost surely, 2^16778450085 is an apocalyptic number.

16778450085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16778450085 is a deficient number, since it is larger than the sum of its proper divisors (10067070075).

16778450085 is a wasteful number, since it uses less digits than its factorization.

16778450085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118563347.

The product of its (nonzero) digits is 1881600, while the sum is 51.

The spelling of 16778450085 in words is "sixteen billion, seven hundred seventy-eight million, four hundred fifty thousand, eighty-five".