196638940000 has 60 divisors (see below), whose sum is σ = 483761337444. Its totient is φ = 78655568000.

The previous prime is 196638939989. The next prime is 196638940019. The reversal of 196638940000 is 49836691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4895974 + ... + 4935973.

Almost surely, 2^196638940000 is an apocalyptic number.

196638940000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196638940000 is an abundant number, since it is smaller than the sum of its proper divisors (287122397444).

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

196638940000 is an frugal number, since it uses more digits than its factorization.

196638940000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9831977 (or 9831954 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 196638940000 in words is "one hundred ninety-six billion, six hundred thirty-eight million, nine hundred forty thousand".