196561944635 has 16 divisors (see below), whose sum is σ = 269592878016. Its totient is φ = 134774227968.

The previous prime is 196561944583. The next prime is 196561944641. The reversal of 196561944635 is 536449165691.

It is a cyclic number.

It is not a de Polignac number, because 196561944635 - 2⁶ = 196561944571 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211427 + ... + 661683.

It is an arithmetic number, because the mean of its divisors is an integer number (16849554876).

Almost surely, 2^196561944635 is an apocalyptic number.

196561944635 is a deficient number, since it is larger than the sum of its proper divisors (73030933381).

196561944635 is a wasteful number, since it uses less digits than its factorization.

196561944635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462742.

The product of its digits is 20995200, while the sum is 59.

The spelling of 196561944635 in words is "one hundred ninety-six billion, five hundred sixty-one million, nine hundred forty-four thousand, six hundred thirty-five".