16381980091 has 8 divisors (see below), whose sum is σ = 16423070768. Its totient is φ = 16340940000.

The previous prime is 16381980067. The next prime is 16381980119. The reversal of 16381980091 is 19008918361.

It is a happy number.

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 16381980091 - 2¹³ = 16381971899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16381980031) 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, 682921 + ... + 706501.

It is an arithmetic number, because the mean of its divisors is an integer number (2052883846).

Almost surely, 2^16381980091 is an apocalyptic number.

16381980091 is a deficient number, since it is larger than the sum of its proper divisors (41090677).

16381980091 is a wasteful number, since it uses less digits than its factorization.

16381980091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25293.

The product of its (nonzero) digits is 93312, while the sum is 46.

The spelling of 16381980091 in words is "sixteen billion, three hundred eighty-one million, nine hundred eighty thousand, ninety-one".