196191987946576 has 80 divisors (see below), whose sum is σ = 404308446603264. Its totient is φ = 91906736965632.

The previous prime is 196191987946543. The next prime is 196191987946613. The reversal of 196191987946576 is 675649789191691.

It is a happy number.

It is a super-2 number, since 2×196191987946576² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

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, 1303240206 + ... + 1303390738.

Almost surely, 2^{196191987946576} is an apocalyptic number.

196191987946576 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 196191987946576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202154223301632).

196191987946576 is an abundant number, since it is smaller than the sum of its proper divisors (208116458656688).

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

196191987946576 is a wasteful number, since it uses less digits than its factorization.

196191987946576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172268 (or 172262 counting only the distinct ones).

The product of its digits is 11110659840, while the sum is 88.

The spelling of 196191987946576 in words is "one hundred ninety-six trillion, one hundred ninety-one billion, nine hundred eighty-seven million, nine hundred forty-six thousand, five hundred seventy-six".