198550540725 has 48 divisors (see below), whose sum is σ = 329157771840. Its totient is φ = 105607756800.

The previous prime is 198550540711. The next prime is 198550540763. The reversal of 198550540725 is 527045055891.

198550540725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198550540725 - 2¹⁹ = 198550016437 is a prime.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 52289527 + ... + 52293323.

It is an arithmetic number, because the mean of its divisors is an integer number (6857453580).

Almost surely, 2^198550540725 is an apocalyptic number.

198550540725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198550540725 is a deficient number, since it is larger than the sum of its proper divisors (130607231115).

198550540725 is a wasteful number, since it uses less digits than its factorization.

198550540725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5510 (or 5505 counting only the distinct ones).

The product of its (nonzero) digits is 2520000, while the sum is 51.

The spelling of 198550540725 in words is "one hundred ninety-eight billion, five hundred fifty million, five hundred forty thousand, seven hundred twenty-five".