987445544788 has 12 divisors (see below), whose sum is σ = 1787616934740. Its totient is φ = 476697849152.

The previous prime is 987445544779. The next prime is 987445544803. The reversal of 987445544788 is 887445544789.

It can be written as a sum of positive squares in 2 ways, for example, as 374823123984 + 612622420804 = 612228^2 + 782702^2 .

It is a super-2 number, since 2×987445544788² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 987445544788.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4256230681 + ... + 4256230912.

It is an arithmetic number, because the mean of its divisors is an integer number (148968077895).

Almost surely, 2^987445544788 is an apocalyptic number.

It is an amenable number.

987445544788 is a deficient number, since it is larger than the sum of its proper divisors (800171389952).

987445544788 is a wasteful number, since it uses less digits than its factorization.

987445544788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8512461626 (or 8512461624 counting only the distinct ones).

The product of its digits is 1445068800, while the sum is 73.

Subtracting from 987445544788 its reverse (887445544789), we obtain a palindrome (99999999999).

The spelling of 987445544788 in words is "nine hundred eighty-seven billion, four hundred forty-five million, five hundred forty-four thousand, seven hundred eighty-eight".