87371785815580 has 96 divisors (see below), whose sum is σ = 214202054416896. Its totient is φ = 29318534328576.

The previous prime is 87371785815511. The next prime is 87371785815581. The reversal of 87371785815580 is 8551858717378.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87371785815581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33892579 + ... + 36379258.

It is an arithmetic number, because the mean of its divisors is an integer number (2231271400176).

Almost surely, 2^{87371785815580} is an apocalyptic number.

It is an amenable number.

87371785815580 is an abundant number, since it is smaller than the sum of its proper divisors (126830268601316).

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

87371785815580 is a wasteful number, since it uses less digits than its factorization.

87371785815580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70272043 (or 70272041 counting only the distinct ones).

The product of its (nonzero) digits is 526848000, while the sum is 73.

The spelling of 87371785815580 in words is "eighty-seven trillion, three hundred seventy-one billion, seven hundred eighty-five million, eight hundred fifteen thousand, five hundred eighty".