16120861691 has 8 divisors (see below), whose sum is σ = 17588262000. Its totient is φ = 14653772640.

The previous prime is 16120861661. The next prime is 16120861697. The reversal of 16120861691 is 19616802161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16120861691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16120861697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37985 + ... + 183533.

It is an arithmetic number, because the mean of its divisors is an integer number (2198532750).

Almost surely, 2^16120861691 is an apocalyptic number.

16120861691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16120861691 is a deficient number, since it is larger than the sum of its proper divisors (1467400309).

16120861691 is a wasteful number, since it uses less digits than its factorization.

16120861691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155629.

The product of its (nonzero) digits is 31104, while the sum is 41.

The spelling of 16120861691 in words is "sixteen billion, one hundred twenty million, eight hundred sixty-one thousand, six hundred ninety-one".