16687138604 has 6 divisors (see below), whose sum is σ = 29202492564. Its totient is φ = 8343569300.

The previous prime is 16687138603. The next prime is 16687138619. The reversal of 16687138604 is 40683178661.

It is not an unprimeable number, because it can be changed into a prime (16687138603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2085892322 + ... + 2085892329.

It is an arithmetic number, because the mean of its divisors is an integer number (4867082094).

Almost surely, 2^16687138604 is an apocalyptic number.

It is an amenable number.

16687138604 is a deficient number, since it is larger than the sum of its proper divisors (12515353960).

16687138604 is a wasteful number, since it uses less digits than its factorization.

16687138604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4171784655 (or 4171784653 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 16687138604 in words is "sixteen billion, six hundred eighty-seven million, one hundred thirty-eight thousand, six hundred four".