198711937801 has 8 divisors (see below), whose sum is σ = 214759032264. Its totient is φ = 182773637760.

The previous prime is 198711937799. The next prime is 198711937807. The reversal of 198711937801 is 108739117891.

It can be written as a sum of positive squares in 4 ways, for example, as 3246264576 + 195465673225 = 56976^2 + 442115^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198711937801 - 2¹ = 198711937799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198711937807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27194806 + ... + 27202111.

It is an arithmetic number, because the mean of its divisors is an integer number (26844879033).

Almost surely, 2^198711937801 is an apocalyptic number.

It is an amenable number.

198711937801 is a deficient number, since it is larger than the sum of its proper divisors (16047094463).

198711937801 is a wasteful number, since it uses less digits than its factorization.

198711937801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54397211.

The product of its (nonzero) digits is 762048, while the sum is 55.

The spelling of 198711937801 in words is "one hundred ninety-eight billion, seven hundred eleven million, nine hundred thirty-seven thousand, eight hundred one".