196654731977 has 16 divisors (see below), whose sum is σ = 216534436800. Its totient is φ = 177109208640.

The previous prime is 196654731971. The next prime is 196654731979. The reversal of 196654731977 is 779137456691.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196654731977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (196654731971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15145274 + ... + 15158252.

It is an arithmetic number, because the mean of its divisors is an integer number (13533402300).

Almost surely, 2^196654731977 is an apocalyptic number.

It is an amenable number.

196654731977 is a deficient number, since it is larger than the sum of its proper divisors (19879704823).

196654731977 is a wasteful number, since it uses less digits than its factorization.

196654731977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25736.

The product of its digits is 60011280, while the sum is 65.

The spelling of 196654731977 in words is "one hundred ninety-six billion, six hundred fifty-four million, seven hundred thirty-one thousand, nine hundred seventy-seven".