16197786742 has 4 divisors (see below), whose sum is σ = 24296680116. Its totient is φ = 8098893370.

The previous prime is 16197786679. The next prime is 16197786749. The reversal of 16197786742 is 24768779161.

It is a happy number.

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

It is a Smith number, since the sum of its digits (58) 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 not an unprimeable number, because it can be changed into a prime (16197786749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4049446684 + ... + 4049446687.

It is an arithmetic number, because the mean of its divisors is an integer number (6074170029).

Almost surely, 2^16197786742 is an apocalyptic number.

16197786742 is a deficient number, since it is larger than the sum of its proper divisors (8098893374).

16197786742 is an equidigital number, since it uses as much as digits as its factorization.

16197786742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8098893373.

The product of its digits is 7112448, while the sum is 58.

The spelling of 16197786742 in words is "sixteen billion, one hundred ninety-seven million, seven hundred eighty-six thousand, seven hundred forty-two".