198597740503 has 4 divisors (see below), whose sum is σ = 198619595128. Its totient is φ = 198575885880.

The previous prime is 198597740501. The next prime is 198597740567. The reversal of 198597740503 is 305047795891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305047795891 = 769 ⋅396681139.

It is a cyclic number.

It is not a de Polignac number, because 198597740503 - 2¹ = 198597740501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198597740501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10913676 + ... + 10931857.

It is an arithmetic number, because the mean of its divisors is an integer number (49654898782).

Almost surely, 2^198597740503 is an apocalyptic number.

198597740503 is a deficient number, since it is larger than the sum of its proper divisors (21854625).

198597740503 is an equidigital number, since it uses as much as digits as its factorization.

198597740503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21854624.

The product of its (nonzero) digits is 9525600, while the sum is 58.

The spelling of 198597740503 in words is "one hundred ninety-eight billion, five hundred ninety-seven million, seven hundred forty thousand, five hundred three".