87972180464 has 80 divisors (see below), whose sum is σ = 195535484928. Its totient is φ = 37559448576.

The previous prime is 87972180403. The next prime is 87972180469. The reversal of 87972180464 is 46408127978.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87972180469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64353509 + ... + 64354875.

Almost surely, 2^87972180464 is an apocalyptic number.

It is an amenable number.

87972180464 is an abundant number, since it is smaller than the sum of its proper divisors (107563304464).

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

87972180464 is a wasteful number, since it uses less digits than its factorization.

87972180464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142 (or 3136 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 56.

The spelling of 87972180464 in words is "eighty-seven billion, nine hundred seventy-two million, one hundred eighty thousand, four hundred sixty-four".