16787639398 has 4 divisors (see below), whose sum is σ = 25181459100. Its totient is φ = 8393819698.

The previous prime is 16787639381. The next prime is 16787639437. The reversal of 16787639398 is 89393678761.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4196909848 + ... + 4196909851.

It is an arithmetic number, because the mean of its divisors is an integer number (6295364775).

Almost surely, 2^16787639398 is an apocalyptic number.

16787639398 is a deficient number, since it is larger than the sum of its proper divisors (8393819702).

16787639398 is an equidigital number, since it uses as much as digits as its factorization.

16787639398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8393819701.

The product of its digits is 82301184, while the sum is 67.

The spelling of 16787639398 in words is "sixteen billion, seven hundred eighty-seven million, six hundred thirty-nine thousand, three hundred ninety-eight".