196421976560 has 20 divisors (see below), whose sum is σ = 456681095688. Its totient is φ = 78568790592.

The previous prime is 196421976557. The next prime is 196421976601. The reversal of 196421976560 is 65679124691.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 196421976496 and 196421976505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1227637274 + ... + 1227637433.

Almost surely, 2^196421976560 is an apocalyptic number.

196421976560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196421976560 is an abundant number, since it is smaller than the sum of its proper divisors (260259119128).

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

196421976560 is a wasteful number, since it uses less digits than its factorization.

196421976560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455274720 (or 2455274714 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 196421976560 in words is "one hundred ninety-six billion, four hundred twenty-one million, nine hundred seventy-six thousand, five hundred sixty".