195128395780 has 48 divisors (see below), whose sum is σ = 423082598400. Its totient is φ = 75516681600.

The previous prime is 195128395757. The next prime is 195128395783. The reversal of 195128395780 is 87593821591.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (195128395783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2942590 + ... + 3008170.

It is an arithmetic number, because the mean of its divisors is an integer number (8814220800).

Almost surely, 2^195128395780 is an apocalyptic number.

195128395780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195128395780 is an abundant number, since it is smaller than the sum of its proper divisors (227954202620).

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

195128395780 is a wasteful number, since it uses less digits than its factorization.

195128395780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70420 (or 70418 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 58.

The spelling of 195128395780 in words is "one hundred ninety-five billion, one hundred twenty-eight million, three hundred ninety-five thousand, seven hundred eighty".