195500155440 has 320 divisors, whose sum is σ = 624158801280. Its totient is φ = 50606899200.

The previous prime is 195500155439. The next prime is 195500155451. The reversal of 195500155440 is 44551005591.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 325291140 + ... + 325291740.

It is an arithmetic number, because the mean of its divisors is an integer number (1950496254).

Almost surely, 2^195500155440 is an apocalyptic number.

195500155440 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 195500155440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312079400640).

195500155440 is an abundant number, since it is smaller than the sum of its proper divisors (428658645840).

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

195500155440 is a wasteful number, since it uses less digits than its factorization.

195500155440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 39.

The spelling of 195500155440 in words is "one hundred ninety-five billion, five hundred million, one hundred fifty-five thousand, four hundred forty".