16695690891 has 32 divisors (see below), whose sum is σ = 25320038400. Its totient is φ = 9692686080.

The previous prime is 16695690881. The next prime is 16695690917. The reversal of 16695690891 is 19809659661.

It is not a de Polignac number, because 16695690891 - 2⁵ = 16695690859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16695690841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52855 + ... + 190223.

It is an arithmetic number, because the mean of its divisors is an integer number (791251200).

Almost surely, 2^16695690891 is an apocalyptic number.

16695690891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16695690891 is a deficient number, since it is larger than the sum of its proper divisors (8624347509).

16695690891 is a wasteful number, since it uses less digits than its factorization.

16695690891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137539.

The product of its (nonzero) digits is 6298560, while the sum is 60.

The spelling of 16695690891 in words is "sixteen billion, six hundred ninety-five million, six hundred ninety thousand, eight hundred ninety-one".