87186818320 has 80 divisors (see below), whose sum is σ = 231709241088. Its totient is φ = 29887280640.

The previous prime is 87186818311. The next prime is 87186818339. The reversal of 87186818320 is 2381868178.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4333885 + ... + 4353955.

Almost surely, 2^87186818320 is an apocalyptic number.

87186818320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87186818320 is an abundant number, since it is smaller than the sum of its proper divisors (144522422768).

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

87186818320 is a wasteful number, since it uses less digits than its factorization.

87186818320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27848 (or 27842 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 52.

The spelling of 87186818320 in words is "eighty-seven billion, one hundred eighty-six million, eight hundred eighteen thousand, three hundred twenty".