16631232194 has 16 divisors (see below), whose sum is σ = 25885233528. Its totient is φ = 8007455232.

The previous prime is 16631232193. The next prime is 16631232217. The reversal of 16631232194 is 49123213661.

It can be written as a sum of positive squares in 4 ways, for example, as 16334118025 + 297114169 = 127805^2 + 17237^2 .

It is not an unprimeable number, because it can be changed into a prime (16631232193) 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, 1151309 + ... + 1165664.

Almost surely, 2^16631232194 is an apocalyptic number.

16631232194 is a deficient number, since it is larger than the sum of its proper divisors (9254001334).

16631232194 is a wasteful number, since it uses less digits than its factorization.

16631232194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317109.

The product of its digits is 46656, while the sum is 38.

The spelling of 16631232194 in words is "sixteen billion, six hundred thirty-one million, two hundred thirty-two thousand, one hundred ninety-four".