87380021580 has 48 divisors (see below), whose sum is σ = 244746910464. Its totient is φ = 23293448640.

The previous prime is 87380021569. The next prime is 87380021587. The reversal of 87380021580 is 8512008378.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (87380021587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66832 + ... + 423351.

It is an arithmetic number, because the mean of its divisors is an integer number (5098893968).

Almost surely, 2^87380021580 is an apocalyptic number.

It is an amenable number.

87380021580 is an abundant number, since it is smaller than the sum of its proper divisors (157366888884).

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

87380021580 is a wasteful number, since it uses less digits than its factorization.

87380021580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493166 (or 493164 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 87380021580 in words is "eighty-seven billion, three hundred eighty million, twenty-one thousand, five hundred eighty".