196973794649 has 4 divisors (see below), whose sum is σ = 198228404964. Its totient is φ = 195719184336.

The previous prime is 196973794639. The next prime is 196973794681. The reversal of 196973794649 is 946497379691.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 118640980249 + 78332814400 = 344443^2 + 279880^2 .

It is a cyclic number.

It is not a de Polignac number, because 196973794649 - 2³² = 192678827353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196973794609) 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, 627304922 + ... + 627305235.

It is an arithmetic number, because the mean of its divisors is an integer number (49557101241).

Almost surely, 2^196973794649 is an apocalyptic number.

It is an amenable number.

196973794649 is a deficient number, since it is larger than the sum of its proper divisors (1254610315).

196973794649 is a wasteful number, since it uses less digits than its factorization.

196973794649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254610314.

The product of its digits is 555532992, while the sum is 74.

The spelling of 196973794649 in words is "one hundred ninety-six billion, nine hundred seventy-three million, seven hundred ninety-four thousand, six hundred forty-nine".