1587998651988 has 96 divisors (see below), whose sum is σ = 4282331332608. Its totient is φ = 448635052800.

The previous prime is 1587998651933. The next prime is 1587998652041. The reversal of 1587998651988 is 8891568997851.

It is a Harshad number since it is a multiple of its sum of digits (84).

It is a self number, because there is not a number n which added to its sum of digits gives 1587998651988.

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, 2383008 + ... + 2975688.

It is an arithmetic number, because the mean of its divisors is an integer number (44607618048).

Almost surely, 2^{1587998651988} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1587998651988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2141165666304).

1587998651988 is an abundant number, since it is smaller than the sum of its proper divisors (2694332680620).

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

1587998651988 is a wasteful number, since it uses less digits than its factorization.

1587998651988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593053 (or 593051 counting only the distinct ones).

The product of its digits is 3135283200, while the sum is 84.

The spelling of 1587998651988 in words is "one trillion, five hundred eighty-seven billion, nine hundred ninety-eight million, six hundred fifty-one thousand, nine hundred eighty-eight".