196765973640 has 48 divisors (see below), whose sum is σ = 639489415500. Its totient is φ = 52470926208.

The previous prime is 196765973597. The next prime is 196765973689. The reversal of 196765973640 is 46379567691.

196765973640 is a `hidden beast` number, since 1 + 9 + 6 + 7 + 6 + 597 + 36 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 187386825924 + 9379147716 = 432882^2 + 96846^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 273285715 + ... + 273286434.

Almost surely, 2^196765973640 is an apocalyptic number.

196765973640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196765973640 is an abundant number, since it is smaller than the sum of its proper divisors (442723441860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

196765973640 is a wasteful number, since it uses less digits than its factorization.

196765973640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546572166 (or 546572159 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 63.

The spelling of 196765973640 in words is "one hundred ninety-six billion, seven hundred sixty-five million, nine hundred seventy-three thousand, six hundred forty".