16634684938 has 8 divisors (see below), whose sum is σ = 24999921540. Its totient is φ = 8301377760.

The previous prime is 16634684897. The next prime is 16634684947. The reversal of 16634684938 is 83948643661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14062876569 + 2571808369 = 118587^2 + 50713^2 .

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, 7981053 + ... + 7983136.

Almost surely, 2^16634684938 is an apocalyptic number.

16634684938 is a deficient number, since it is larger than the sum of its proper divisors (8365236602).

16634684938 is a wasteful number, since it uses less digits than its factorization.

16634684938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15964712.

The product of its digits is 17915904, while the sum is 58.

The spelling of 16634684938 in words is "sixteen billion, six hundred thirty-four million, six hundred eighty-four thousand, nine hundred thirty-eight".