198651231045 has 24 divisors (see below), whose sum is σ = 344359631616. Its totient is φ = 105937836768.

The previous prime is 198651231043. The next prime is 198651231059. The reversal of 198651231045 is 540132156891.

It is a happy number.

198651231045 is a `hidden beast` number, since 1 + 9 + 86 + 512 + 3 + 10 + 45 = 666.

It is not a de Polignac number, because 198651231045 - 2¹ = 198651231043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198651231043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 325752 + ... + 709518.

It is an arithmetic number, because the mean of its divisors is an integer number (14348317984).

Almost surely, 2^198651231045 is an apocalyptic number.

198651231045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198651231045 is a deficient number, since it is larger than the sum of its proper divisors (145708400571).

198651231045 is a wasteful number, since it uses less digits than its factorization.

198651231045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395281 (or 395278 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 198651231045 in words is "one hundred ninety-eight billion, six hundred fifty-one million, two hundred thirty-one thousand, forty-five".