1988375816580 has 192 divisors, whose sum is σ = 5947943823360. Its totient is φ = 495108117504.

The previous prime is 1988375816549. The next prime is 1988375816639. The reversal of 1988375816580 is 856185738891.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 118849656 + ... + 118866384.

It is an arithmetic number, because the mean of its divisors is an integer number (30978874080).

Almost surely, 2^{1988375816580} is an apocalyptic number.

1988375816580 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 1988375816580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2973971911680).

1988375816580 is an abundant number, since it is smaller than the sum of its proper divisors (3959568006780).

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

1988375816580 is a wasteful number, since it uses less digits than its factorization.

1988375816580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18810 (or 18808 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 69.

The spelling of 1988375816580 in words is "one trillion, nine hundred eighty-eight billion, three hundred seventy-five million, eight hundred sixteen thousand, five hundred eighty".