16191086810 has 16 divisors (see below), whose sum is σ = 29148213096. Its totient is φ = 6475488768.

The previous prime is 16191086783. The next prime is 16191086827. The reversal of 16191086810 is 1868019161.

It can be written as a sum of positive squares in 4 ways, for example, as 14920378201 + 1270708609 = 122149^2 + 35647^2 .

It is a super-2 number, since 2×16191086810² (a number of 21 digits) contains 22 as substring.

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, 44147 + ... + 185286.

Almost surely, 2^16191086810 is an apocalyptic number.

16191086810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16191086810 is a deficient number, since it is larger than the sum of its proper divisors (12957126286).

16191086810 is a wasteful number, since it uses less digits than its factorization.

16191086810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236497.

The product of its (nonzero) digits is 20736, while the sum is 41.

The spelling of 16191086810 in words is "sixteen billion, one hundred ninety-one million, eighty-six thousand, eight hundred ten".