16197840985 has 8 divisors (see below), whose sum is σ = 19590460416. Its totient is φ = 12856238640.

The previous prime is 16197840983. The next prime is 16197840991. The reversal of 16197840985 is 58904879161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16197840985 - 2¹ = 16197840983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16197840983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12753571 + ... + 12754840.

It is an arithmetic number, because the mean of its divisors is an integer number (2448807552).

Almost surely, 2^16197840985 is an apocalyptic number.

It is an amenable number.

16197840985 is a deficient number, since it is larger than the sum of its proper divisors (3392619431).

16197840985 is a wasteful number, since it uses less digits than its factorization.

16197840985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25508543.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 16197840985 in words is "sixteen billion, one hundred ninety-seven million, eight hundred forty thousand, nine hundred eighty-five".