196507221819 has 32 divisors (see below), whose sum is σ = 276102673920. Its totient is φ = 124073123328.

The previous prime is 196507221769. The next prime is 196507221913. The reversal of 196507221819 is 918122705691.

It is not a de Polignac number, because 196507221819 - 2⁸ = 196507221563 is a prime.

It is a super-2 number, since 2×196507221819² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (196507221719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7932777 + ... + 7957509.

It is an arithmetic number, because the mean of its divisors is an integer number (8628208560).

Almost surely, 2^196507221819 is an apocalyptic number.

196507221819 is a deficient number, since it is larger than the sum of its proper divisors (79595452101).

196507221819 is a wasteful number, since it uses less digits than its factorization.

196507221819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25891.

The product of its (nonzero) digits is 544320, while the sum is 51.

It can be divided in two parts, 1965072 and 21819, that added together give a palindrome (1986891).

The spelling of 196507221819 in words is "one hundred ninety-six billion, five hundred seven million, two hundred twenty-one thousand, eight hundred nineteen".