198750451393 has 4 divisors (see below), whose sum is σ = 214038947668. Its totient is φ = 183461955120.

The previous prime is 198750451363. The next prime is 198750451429. The reversal of 198750451393 is 393154057891.

198750451393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122103421489 + 76647029904 = 349433^2 + 276852^2 .

It is a cyclic number.

It is not a de Polignac number, because 198750451393 - 2³⁷ = 61311497921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198750451363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7644248118 + ... + 7644248143.

It is an arithmetic number, because the mean of its divisors is an integer number (53509736917).

Almost surely, 2^198750451393 is an apocalyptic number.

198750451393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

198750451393 is a deficient number, since it is larger than the sum of its proper divisors (15288496275).

198750451393 is a wasteful number, since it uses less digits than its factorization.

198750451393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15288496274.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 198750451393 in words is "one hundred ninety-eight billion, seven hundred fifty million, four hundred fifty-one thousand, three hundred ninety-three".