16350191661 has 8 divisors (see below), whose sum is σ = 21800926080. Its totient is φ = 10899792512.

The previous prime is 16350191653. The next prime is 16350191681. The reversal of 16350191661 is 16619105361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16350191661 - 2³ = 16350191653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16350191651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70636 + ... + 194138.

It is an arithmetic number, because the mean of its divisors is an integer number (2725115760).

Almost surely, 2^16350191661 is an apocalyptic number.

It is an amenable number.

16350191661 is a deficient number, since it is larger than the sum of its proper divisors (5450734419).

16350191661 is a wasteful number, since it uses less digits than its factorization.

16350191661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167635.

The product of its (nonzero) digits is 29160, while the sum is 39.

The spelling of 16350191661 in words is "sixteen billion, three hundred fifty million, one hundred ninety-one thousand, six hundred sixty-one".