198521963481 has 8 divisors (see below), whose sum is σ = 264879901440. Its totient is φ = 132256000592.

The previous prime is 198521963473. The next prime is 198521963483. The reversal of 198521963481 is 184369125891.

It is a happy number.

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 198521963481 - 2³ = 198521963473 is a prime.

It is a super-2 number, since 2×198521963481² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (198521963483) 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, 22988730 + ... + 22997363.

It is an arithmetic number, because the mean of its divisors is an integer number (33109987680).

Almost surely, 2^198521963481 is an apocalyptic number.

It is an amenable number.

198521963481 is a deficient number, since it is larger than the sum of its proper divisors (66357937959).

198521963481 is a wasteful number, since it uses less digits than its factorization.

198521963481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45987535.

The product of its digits is 3732480, while the sum is 57.

The spelling of 198521963481 in words is "one hundred ninety-eight billion, five hundred twenty-one million, nine hundred sixty-three thousand, four hundred eighty-one".