16631440197 has 16 divisors (see below), whose sum is σ = 22701062208. Its totient is φ = 10824952320.

The previous prime is 16631440181. The next prime is 16631440219. The reversal of 16631440197 is 79104413661.

It is not a de Polignac number, because 16631440197 - 2⁴ = 16631440181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16631440117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274453 + ... + 329525.

It is an arithmetic number, because the mean of its divisors is an integer number (1418816388).

Almost surely, 2^16631440197 is an apocalyptic number.

It is an amenable number.

16631440197 is a deficient number, since it is larger than the sum of its proper divisors (6069622011).

16631440197 is a wasteful number, since it uses less digits than its factorization.

16631440197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57460.

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 16631440197 in words is "sixteen billion, six hundred thirty-one million, four hundred forty thousand, one hundred ninety-seven".