198228501887 has 16 divisors (see below), whose sum is σ = 226055460960. Its totient is φ = 172200502272.

The previous prime is 198228501871. The next prime is 198228501899. The reversal of 198228501887 is 788105822891.

It is a cyclic number.

It is not a de Polignac number, because 198228501887 - 2⁴ = 198228501871 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 (198228503887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2742068 + ... + 2813430.

It is an arithmetic number, because the mean of its divisors is an integer number (14128466310).

Almost surely, 2^198228501887 is an apocalyptic number.

198228501887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

198228501887 is a deficient number, since it is larger than the sum of its proper divisors (27826959073).

198228501887 is a wasteful number, since it uses less digits than its factorization.

198228501887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83962.

The product of its (nonzero) digits is 5160960, while the sum is 59.

The spelling of 198228501887 in words is "one hundred ninety-eight billion, two hundred twenty-eight million, five hundred one thousand, eight hundred eighty-seven".