1995581697000 has 128 divisors (see below), whose sum is σ = 6263499191040. Its totient is φ = 528968428800.

The previous prime is 1995581696993. The next prime is 1995581697013. The reversal of 1995581697000 is 7961855991.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1490599 + ... + 2492598.

It is an arithmetic number, because the mean of its divisors is an integer number (48933587430).

Almost surely, 2^{1995581697000} is an apocalyptic number.

1995581697000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1995581697000 is an abundant number, since it is smaller than the sum of its proper divisors (4267917494040).

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

1995581697000 is a wasteful number, since it uses less digits than its factorization.

1995581697000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3983388 (or 3983374 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 60.

The spelling of 1995581697000 in words is "one trillion, nine hundred ninety-five billion, five hundred eighty-one million, six hundred ninety-seven thousand".