16610506091 has 4 divisors (see below), whose sum is σ = 17332702032. Its totient is φ = 15888310152.

The previous prime is 16610506063. The next prime is 16610506103. The reversal of 16610506091 is 19060501661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16610506091 - 2⁶ = 16610506027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16610506051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361097936 + ... + 361097981.

It is an arithmetic number, because the mean of its divisors is an integer number (4333175508).

Almost surely, 2^16610506091 is an apocalyptic number.

16610506091 is a deficient number, since it is larger than the sum of its proper divisors (722195941).

16610506091 is an equidigital number, since it uses as much as digits as its factorization.

16610506091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722195940.

The product of its (nonzero) digits is 9720, while the sum is 35.

The spelling of 16610506091 in words is "sixteen billion, six hundred ten million, five hundred six thousand, ninety-one".