16981151983 has 4 divisors (see below), whose sum is σ = 17024805720. Its totient is φ = 16937498248.

The previous prime is 16981151963. The next prime is 16981152079. The reversal of 16981151983 is 38915118961.

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 16981151983 - 2²¹ = 16979054831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16981151983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16981151963) 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, 21826285 + ... + 21827062.

It is an arithmetic number, because the mean of its divisors is an integer number (4256201430).

Almost surely, 2^16981151983 is an apocalyptic number.

16981151983 is a deficient number, since it is larger than the sum of its proper divisors (43653737).

16981151983 is an equidigital number, since it uses as much as digits as its factorization.

16981151983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43653736.

The product of its digits is 466560, while the sum is 52.

The spelling of 16981151983 in words is "sixteen billion, nine hundred eighty-one million, one hundred fifty-one thousand, nine hundred eighty-three".