196385693640 has 32 divisors (see below), whose sum is σ = 589157081280. Its totient is φ = 52369518272.

The previous prime is 196385693629. The next prime is 196385693653. The reversal of 196385693640 is 46396583691.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 818273604 + ... + 818273843.

It is an arithmetic number, because the mean of its divisors is an integer number (18411158790).

Almost surely, 2^196385693640 is an apocalyptic number.

196385693640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196385693640 is an abundant number, since it is smaller than the sum of its proper divisors (392771387640).

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

196385693640 is a wasteful number, since it uses less digits than its factorization.

196385693640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636547461 (or 1636547457 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 60.

The spelling of 196385693640 in words is "one hundred ninety-six billion, three hundred eighty-five million, six hundred ninety-three thousand, six hundred forty".