16815945938 has 8 divisors (see below), whose sum is σ = 27517002480. Its totient is φ = 7643611780.

The previous prime is 16815945893. The next prime is 16815945967. The reversal of 16815945938 is 83954951861.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382180568 + ... + 382180611.

It is an arithmetic number, because the mean of its divisors is an integer number (3439625310).

Almost surely, 2^16815945938 is an apocalyptic number.

16815945938 is a deficient number, since it is larger than the sum of its proper divisors (10701056542).

16815945938 is a wasteful number, since it uses less digits than its factorization.

16815945938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764361192.

The product of its digits is 9331200, while the sum is 59.

The spelling of 16815945938 in words is "sixteen billion, eight hundred fifteen million, nine hundred forty-five thousand, nine hundred thirty-eight".