16646198037 has 32 divisors (see below), whose sum is σ = 25708089600. Its totient is φ = 9384173568.

The previous prime is 16646198021. The next prime is 16646198113. The reversal of 16646198037 is 73089164661.

It is a happy number.

It is not a de Polignac number, because 16646198037 - 2⁴ = 16646198021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16646198237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 844389 + ... + 863877.

It is an arithmetic number, because the mean of its divisors is an integer number (803377800).

Almost surely, 2^16646198037 is an apocalyptic number.

It is an amenable number.

16646198037 is a deficient number, since it is larger than the sum of its proper divisors (9061891563).

16646198037 is a wasteful number, since it uses less digits than its factorization.

16646198037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20045.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 16646198037 in words is "sixteen billion, six hundred forty-six million, one hundred ninety-eight thousand, thirty-seven".