195028978782720 has 320 divisors, whose sum is σ = 656560026397440. Its totient is φ = 49290127147008.

The previous prime is 195028978782619. The next prime is 195028978782769. The reversal of 195028978782720 is 27287879820591.

It is a tau number, because it is divible by the number of its divisors (320).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14189062 + ... + 24318458.

It is an arithmetic number, because the mean of its divisors is an integer number (2051750082492).

Almost surely, 2^{195028978782720} is an apocalyptic number.

195028978782720 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 195028978782720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328280013198720).

195028978782720 is an abundant number, since it is smaller than the sum of its proper divisors (461531047614720).

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

195028978782720 is a wasteful number, since it uses less digits than its factorization.

195028978782720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10129555 (or 10129539 counting only the distinct ones).

The product of its (nonzero) digits is 568995840, while the sum is 75.

The spelling of 195028978782720 in words is "one hundred ninety-five trillion, twenty-eight billion, nine hundred seventy-eight million, seven hundred eighty-two thousand, seven hundred twenty".