198081255426516 has 144 divisors (see below), whose sum is σ = 631270191726720. Its totient is φ = 50871590415360.

The previous prime is 198081255426497. The next prime is 198081255426623. The reversal of 198081255426516 is 615624552180891.

It is a happy number.

198081255426516 is a `hidden beast` number, since 1 + 9 + 8 + 0 + 8 + 1 + 2 + 554 + 2 + 65 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 401202081 + ... + 401695496.

It is an arithmetic number, because the mean of its divisors is an integer number (4383820775880).

Almost surely, 2^{198081255426516} is an apocalyptic number.

It is an amenable number.

198081255426516 is an abundant number, since it is smaller than the sum of its proper divisors (433188936300204).

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

198081255426516 is a wasteful number, since it uses less digits than its factorization.

198081255426516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802897694 (or 802897689 counting only the distinct ones).

The product of its (nonzero) digits is 41472000, while the sum is 63.

The spelling of 198081255426516 in words is "one hundred ninety-eight trillion, eighty-one billion, two hundred fifty-five million, four hundred twenty-six thousand, five hundred sixteen".