1995567655020 has 96 divisors (see below), whose sum is σ = 5882578732800. Its totient is φ = 504065781504.

The previous prime is 1995567654967. The next prime is 1995567655027. The reversal of 1995567655020 is 205567655991.

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

It is not an unprimeable number, because it can be changed into a prime (1995567655027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7459822 + ... + 7722698.

It is an arithmetic number, because the mean of its divisors is an integer number (61276861800).

Almost surely, 2^{1995567655020} is an apocalyptic number.

1995567655020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1995567655020 is an abundant number, since it is smaller than the sum of its proper divisors (3887011077780).

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

1995567655020 is a wasteful number, since it uses less digits than its factorization.

1995567655020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269567 (or 269565 counting only the distinct ones).

The product of its (nonzero) digits is 25515000, while the sum is 60.

The spelling of 1995567655020 in words is "one trillion, nine hundred ninety-five billion, five hundred sixty-seven million, six hundred fifty-five thousand, twenty".