16890691215 has 16 divisors (see below), whose sum is σ = 27071957088. Its totient is φ = 8992751616.

The previous prime is 16890691201. The next prime is 16890691271. The reversal of 16890691215 is 51219609861.

It is not a de Polignac number, because 16890691215 - 2⁷ = 16890691087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 967122 + ... + 984431.

It is an arithmetic number, because the mean of its divisors is an integer number (1691997318).

Almost surely, 2^16890691215 is an apocalyptic number.

16890691215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16890691215 is a deficient number, since it is larger than the sum of its proper divisors (10181265873).

16890691215 is a wasteful number, since it uses less digits than its factorization.

16890691215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952138.

The product of its (nonzero) digits is 233280, while the sum is 48.

The spelling of 16890691215 in words is "sixteen billion, eight hundred ninety million, six hundred ninety-one thousand, two hundred fifteen".