16776208065 has 16 divisors (see below), whose sum is σ = 26845031808. Its totient is φ = 8946278016.

The previous prime is 16776208013. The next prime is 16776208081. The reversal of 16776208065 is 56080267761.

It is not a de Polignac number, because 16776208065 - 2¹⁹ = 16775683777 is a prime.

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, 80164 + ... + 199946.

It is an arithmetic number, because the mean of its divisors is an integer number (1677814488).

Almost surely, 2^16776208065 is an apocalyptic number.

16776208065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16776208065 is a deficient number, since it is larger than the sum of its proper divisors (10068823743).

16776208065 is a wasteful number, since it uses less digits than its factorization.

16776208065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129128.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 16776208065 in words is "sixteen billion, seven hundred seventy-six million, two hundred eight thousand, sixty-five".