87987981504 has 224 divisors, whose sum is σ = 247927668736. Its totient is φ = 27494691840.

The previous prime is 87987981503. The next prime is 87987981551. The reversal of 87987981504 is 40518978978.

It is a super-2 number, since 2×87987981504² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87987981503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32502519 + ... + 32505225.

Almost surely, 2^87987981504 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 87987981504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123963834368).

87987981504 is an abundant number, since it is smaller than the sum of its proper divisors (159939687232).

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

87987981504 is a wasteful number, since it uses less digits than its factorization.

87987981504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923 (or 2913 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 66.

The spelling of 87987981504 in words is "eighty-seven billion, nine hundred eighty-seven million, nine hundred eighty-one thousand, five hundred four".