198363781801837 has 32 divisors (see below), whose sum is σ = 210341260846080. Its totient is φ = 186761267136000.

The previous prime is 198363781801831. The next prime is 198363781801847. The reversal of 198363781801837 is 738108187363891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198363781801837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198363781801837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198363781801831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2438928262 + ... + 2439009592.

It is an arithmetic number, because the mean of its divisors is an integer number (6573164401440).

Almost surely, 2^{198363781801837} is an apocalyptic number.

It is an amenable number.

198363781801837 is a deficient number, since it is larger than the sum of its proper divisors (11977479044243).

198363781801837 is a wasteful number, since it uses less digits than its factorization.

198363781801837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86725.

The product of its (nonzero) digits is 292626432, while the sum is 73.

The spelling of 198363781801837 in words is "one hundred ninety-eight trillion, three hundred sixty-three billion, seven hundred eighty-one million, eight hundred one thousand, eight hundred thirty-seven".