1990045177488 has 80 divisors (see below), whose sum is σ = 5723801064000. Its totient is φ = 661997306880.

The previous prime is 1990045177451. The next prime is 1990045177513. The reversal of 1990045177488 is 8847715400991.

1990045177488 is a `hidden beast` number, since 19 + 90 + 0 + 4 + 51 + 7 + 7 + 488 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4478913 + ... + 4903136.

It is an arithmetic number, because the mean of its divisors is an integer number (71547513300).

Almost surely, 2^{1990045177488} is an apocalyptic number.

1990045177488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1990045177488 is an abundant number, since it is smaller than the sum of its proper divisors (3733755886512).

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

1990045177488 is a wasteful number, since it uses less digits than its factorization.

1990045177488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9382557 (or 9382545 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 63.

The spelling of 1990045177488 in words is "one trillion, nine hundred ninety billion, forty-five million, one hundred seventy-seven thousand, four hundred eighty-eight".