196978187232 has 144 divisors (see below), whose sum is σ = 599642813952. Its totient is φ = 63541272960.

The previous prime is 196978187227. The next prime is 196978187233. The reversal of 196978187232 is 232781879691.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 196978187232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196978187233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167518 + ... + 649629.

It is an arithmetic number, because the mean of its divisors is an integer number (4164186208).

Almost surely, 2^196978187232 is an apocalyptic number.

196978187232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

196978187232 is an abundant number, since it is smaller than the sum of its proper divisors (402664626720).

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

196978187232 is an equidigital number, since it uses as much as digits as its factorization.

196978187232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817203 (or 817183 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The spelling of 196978187232 in words is "one hundred ninety-six billion, nine hundred seventy-eight million, one hundred eighty-seven thousand, two hundred thirty-two".