195878051928 has 256 divisors, whose sum is σ = 591464025600. Its totient is φ = 59706616320.

The previous prime is 195878051857. The next prime is 195878051977. The reversal of 195878051928 is 829150878591.

195878051928 is a `hidden beast` number, since 1 + 95 + 8 + 7 + 8 + 0 + 519 + 28 = 666.

It is a super-2 number, since 2×195878051928² (a number of 23 digits) contains 22 as substring.

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, 283470063 + ... + 283470753.

It is an arithmetic number, because the mean of its divisors is an integer number (2310406350).

Almost surely, 2^195878051928 is an apocalyptic number.

195878051928 is a gapful number since it is divisible by the number (18) 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 195878051928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295732012800).

195878051928 is an abundant number, since it is smaller than the sum of its proper divisors (395585973672).

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

195878051928 is a wasteful number, since it uses less digits than its factorization.

195878051928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519 (or 1509 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 63.

The spelling of 195878051928 in words is "one hundred ninety-five billion, eight hundred seventy-eight million, fifty-one thousand, nine hundred twenty-eight".