198523815373920 has 384 divisors, whose sum is σ = 651505021009920. Its totient is φ = 50758426368000.

The previous prime is 198523815373907. The next prime is 198523815373987. The reversal of 198523815373920 is 29373518325891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1206522055 + ... + 1206686585.

It is an arithmetic number, because the mean of its divisors is an integer number (1696627658880).

Almost surely, 2^{198523815373920} is an apocalyptic number.

198523815373920 is a gapful number since it is divisible by the number (10) 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 198523815373920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325752510504960).

198523815373920 is an abundant number, since it is smaller than the sum of its proper divisors (452981205636000).

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

198523815373920 is a wasteful number, since it uses less digits than its factorization.

198523815373920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165330 (or 165322 counting only the distinct ones).

The product of its (nonzero) digits is 97977600, while the sum is 66.

The spelling of 198523815373920 in words is "one hundred ninety-eight trillion, five hundred twenty-three billion, eight hundred fifteen million, three hundred seventy-three thousand, nine hundred twenty".