87540723684 has 18 divisors (see below), whose sum is σ = 221283496070. Its totient is φ = 29180241216.

The previous prime is 87540723679. The next prime is 87540723701. The reversal of 87540723684 is 48632704578.

It can be written as a sum of positive squares in only one way, i.e., 66291830784 + 21248892900 = 257472^2 + 145770^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 87540723684.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1215843349 + ... + 1215843420.

Almost surely, 2^87540723684 is an apocalyptic number.

It is an amenable number.

87540723684 is an abundant number, since it is smaller than the sum of its proper divisors (133742772386).

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

87540723684 is a wasteful number, since it uses less digits than its factorization.

87540723684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431686779 (or 2431686774 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 54.

The spelling of 87540723684 in words is "eighty-seven billion, five hundred forty million, seven hundred twenty-three thousand, six hundred eighty-four".