916189166821 has 8 divisors (see below), whose sum is σ = 916575200640. Its totient is φ = 915803212368.

The previous prime is 916189166779. The next prime is 916189166861. The reversal of 916189166821 is 128661981619.

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 916189166821 - 2⁹ = 916189166309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916189166861) 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, 34747575 + ... + 34773931.

It is an arithmetic number, because the mean of its divisors is an integer number (114571900080).

Almost surely, 2^916189166821 is an apocalyptic number.

It is an amenable number.

916189166821 is a deficient number, since it is larger than the sum of its proper divisors (386033819).

916189166821 is a wasteful number, since it uses less digits than its factorization.

916189166821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39683.

The product of its digits is 2239488, while the sum is 58.

The spelling of 916189166821 in words is "nine hundred sixteen billion, one hundred eighty-nine million, one hundred sixty-six thousand, eight hundred twenty-one".