1198297633842 has 128 divisors (see below), whose sum is σ = 2915553484800. Its totient is φ = 363406305600.

The previous prime is 1198297633817. The next prime is 1198297633843. The reversal of 1198297633842 is 2483367928911.

1198297633842 is a `hidden beast` number, since 1 + 1 + 9 + 8 + 297 + 6 + 338 + 4 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1198297633842.

It is not an unprimeable number, because it can be changed into a prime (1198297633843) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4022788 + ... + 4310384.

It is an arithmetic number, because the mean of its divisors is an integer number (22777761600).

Almost surely, 2^{1198297633842} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1198297633842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1457776742400).

1198297633842 is an abundant number, since it is smaller than the sum of its proper divisors (1717255850958).

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

1198297633842 is a wasteful number, since it uses less digits than its factorization.

1198297633842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287789 (or 287783 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The spelling of 1198297633842 in words is "one trillion, one hundred ninety-eight billion, two hundred ninety-seven million, six hundred thirty-three thousand, eight hundred forty-two".