87318164021 has 8 divisors (see below), whose sum is σ = 95275769184. Its totient is φ = 79363823920.

The previous prime is 87318163991. The next prime is 87318164029. The reversal of 87318164021 is 12046181378.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87318164021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87318164021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87318164029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760175 + ... + 867468.

It is an arithmetic number, because the mean of its divisors is an integer number (11909471148).

Almost surely, 2^87318164021 is an apocalyptic number.

It is an amenable number.

87318164021 is a deficient number, since it is larger than the sum of its proper divisors (7957605163).

87318164021 is a wasteful number, since it uses less digits than its factorization.

87318164021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632531.

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 87318164021 in words is "eighty-seven billion, three hundred eighteen million, one hundred sixty-four thousand, twenty-one".