198736615422 has 384 divisors, whose sum is σ = 494176370688. Its totient is φ = 59717347200.

The previous prime is 198736615393. The next prime is 198736615507. The reversal of 198736615422 is 224516637891.

It is a happy number.

198736615422 is a `hidden beast` number, since 1 + 9 + 8 + 7 + 36 + 61 + 542 + 2 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1857351493 + ... + 1857351599.

It is an arithmetic number, because the mean of its divisors is an integer number (1286917632).

Almost surely, 2^198736615422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198736615422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247088185344).

198736615422 is an abundant number, since it is smaller than the sum of its proper divisors (295439755266).

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

198736615422 is a wasteful number, since it uses less digits than its factorization.

198736615422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 294 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 198736615422 in words is "one hundred ninety-eight billion, seven hundred thirty-six million, six hundred fifteen thousand, four hundred twenty-two".