198840091271577 has 32 divisors (see below), whose sum is σ = 310386593986560. Its totient is φ = 110850882660480.

The previous prime is 198840091271411. The next prime is 198840091271593. The reversal of 198840091271577 is 775172190048891.

It is not a de Polignac number, because 198840091271577 - 2¹² = 198840091267481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198840091271777) 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 31 ways as a sum of consecutive naturals, for example, 145049788 + ... + 146414210.

It is an arithmetic number, because the mean of its divisors is an integer number (9699581062080).

Almost surely, 2^{198840091271577} is an apocalyptic number.

It is an amenable number.

198840091271577 is a deficient number, since it is larger than the sum of its proper divisors (111546502714983).

198840091271577 is a wasteful number, since it uses less digits than its factorization.

198840091271577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533733.

The product of its (nonzero) digits is 71124480, while the sum is 69.

The spelling of 198840091271577 in words is "one hundred ninety-eight trillion, eight hundred forty billion, ninety-one million, two hundred seventy-one thousand, five hundred seventy-seven".