1995109056 has 280 divisors, whose sum is σ = 6395130720. Its totient is φ = 613122048.

The previous prime is 1995109037. The next prime is 1995109091. The reversal of 1995109056 is 6509015991.

It is a happy number.

It is a super-2 number, since 2×1995109056² = 7960920290666422272, which contains 22 as substring.

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 3457440 + ... + 3458016.

Almost surely, 2^1995109056 is an apocalyptic number.

1995109056 is a gapful number since it is divisible by the number (16) 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 1995109056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3197565360).

1995109056 is an abundant number, since it is smaller than the sum of its proper divisors (4400021664).

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

1995109056 is a wasteful number, since it uses less digits than its factorization.

1995109056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 109350, while the sum is 45.

The square root of 1995109056 is about 44666.6436616856. The cubic root of 1995109056 is about 1258.8931776782.

The spelling of 1995109056 in words is "one billion, nine hundred ninety-five million, one hundred nine thousand, fifty-six".