196389721242 has 192 divisors, whose sum is σ = 533429769600. Its totient is φ = 51329064960.

The previous prime is 196389721201. The next prime is 196389721271. The reversal of 196389721242 is 242127983691.

196389721242 is a `hidden beast` number, since 1 + 9 + 6 + 389 + 7 + 212 + 42 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3542634 + ... + 3597642.

It is an arithmetic number, because the mean of its divisors is an integer number (2778280050).

Almost surely, 2^196389721242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 196389721242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266714884800).

196389721242 is an abundant number, since it is smaller than the sum of its proper divisors (337040048358).

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

196389721242 is a wasteful number, since it uses less digits than its factorization.

196389721242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55133 (or 55130 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The spelling of 196389721242 in words is "one hundred ninety-six billion, three hundred eighty-nine million, seven hundred twenty-one thousand, two hundred forty-two".