16638981151 has 8 divisors (see below), whose sum is σ = 17938413920. Its totient is φ = 15342335712.

The previous prime is 16638981143. The next prime is 16638981167. The reversal of 16638981151 is 15118983661.

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 16638981151 - 2³ = 16638981143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16638981095 and 16638981104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16638988151) 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, 684420 + ... + 708313.

It is an arithmetic number, because the mean of its divisors is an integer number (2242301740).

Almost surely, 2^16638981151 is an apocalyptic number.

16638981151 is a deficient number, since it is larger than the sum of its proper divisors (1299432769).

16638981151 is a wasteful number, since it uses less digits than its factorization.

16638981151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393665.

The product of its digits is 311040, while the sum is 49.

The spelling of 16638981151 in words is "sixteen billion, six hundred thirty-eight million, nine hundred eighty-one thousand, one hundred fifty-one".