198021675264 has 144 divisors (see below), whose sum is σ = 611306830848. Its totient is φ = 55733078016.

The previous prime is 198021675233. The next prime is 198021675283. The reversal of 198021675264 is 462576120891.

It is a super-2 number, since 2×198021675264² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85309 + ... + 635075.

Almost surely, 2^198021675264 is an apocalyptic number.

198021675264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198021675264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305653415424).

198021675264 is an abundant number, since it is smaller than the sum of its proper divisors (413285155584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198021675264 is an equidigital number, since it uses as much as digits as its factorization.

198021675264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549860 (or 549846 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 198021675264 in words is "one hundred ninety-eight billion, twenty-one million, six hundred seventy-five thousand, two hundred sixty-four".