1995427847808 has 256 divisors, whose sum is σ = 5978407680000. Its totient is φ = 655118171136.

The previous prime is 1995427847789. The next prime is 1995427847813. The reversal of 1995427847808 is 8087487245991.

1995427847808 is a `hidden beast` number, since 1 + 9 + 9 + 542 + 7 + 8 + 4 + 78 + 0 + 8 = 666.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 114388335 + ... + 114405777.

It is an arithmetic number, because the mean of its divisors is an integer number (23353155000).

Almost surely, 2^{1995427847808} is an apocalyptic number.

1995427847808 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 1995427847808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2989203840000).

1995427847808 is an abundant number, since it is smaller than the sum of its proper divisors (3982979832192).

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

1995427847808 is a wasteful number, since it uses less digits than its factorization.

1995427847808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17964 (or 17946 counting only the distinct ones).

The product of its (nonzero) digits is 325140480, while the sum is 72.

The spelling of 1995427847808 in words is "one trillion, nine hundred ninety-five billion, four hundred twenty-seven million, eight hundred forty-seven thousand, eight hundred eight".