196924811639 has 4 divisors (see below), whose sum is σ = 196957031856. Its totient is φ = 196892591424.

The previous prime is 196924811621. The next prime is 196924811651. The reversal of 196924811639 is 936118429691.

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

It is a cyclic number.

It is not a de Polignac number, because 196924811639 - 2²⁰ = 196923763063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196924816639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16100939 + ... + 16113164.

It is an arithmetic number, because the mean of its divisors is an integer number (49239257964).

Almost surely, 2^196924811639 is an apocalyptic number.

196924811639 is a deficient number, since it is larger than the sum of its proper divisors (32220217).

196924811639 is an equidigital number, since it uses as much as digits as its factorization.

196924811639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32220216.

The product of its digits is 5038848, while the sum is 59.

The spelling of 196924811639 in words is "one hundred ninety-six billion, nine hundred twenty-four million, eight hundred eleven thousand, six hundred thirty-nine".