196585211721 has 16 divisors (see below), whose sum is σ = 263210342400. Its totient is φ = 130509464208.

The previous prime is 196585211657. The next prime is 196585211723. The reversal of 196585211721 is 127112585691.

It is not a de Polignac number, because 196585211721 - 2⁶ = 196585211657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (196585211723) 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, 647430 + ... + 901296.

It is an arithmetic number, because the mean of its divisors is an integer number (16450646400).

Almost surely, 2^196585211721 is an apocalyptic number.

It is an amenable number.

196585211721 is a deficient number, since it is larger than the sum of its proper divisors (66625130679).

196585211721 is a wasteful number, since it uses less digits than its factorization.

196585211721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254948.

The product of its digits is 302400, while the sum is 48.

The spelling of 196585211721 in words is "one hundred ninety-six billion, five hundred eighty-five million, two hundred eleven thousand, seven hundred twenty-one".