1988456543040 has 224 divisors, whose sum is σ = 6894008340480. Its totient is φ = 481579878400.

The previous prime is 1988456543027. The next prime is 1988456543063. The reversal of 1988456543040 is 403456548891.

It is a congruent number.

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, 10796041 + ... + 10978679.

Almost surely, 2^{1988456543040} is an apocalyptic number.

1988456543040 is a gapful number since it is divisible by the number (10) 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 1988456543040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3447004170240).

1988456543040 is an abundant number, since it is smaller than the sum of its proper divisors (4905551797440).

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

1988456543040 is a wasteful number, since it uses less digits than its factorization.

1988456543040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183701 (or 183691 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 57.

The spelling of 1988456543040 in words is "one trillion, nine hundred eighty-eight billion, four hundred fifty-six million, five hundred forty-three thousand, forty".