87532552657640 has 128 divisors (see below), whose sum is σ = 203533510752000. Its totient is φ = 33859986155520.

The previous prime is 87532552657607. The next prime is 87532552657657. The reversal of 87532552657640 is 4675625523578.

It is a happy number.

It is an unprimeable number.

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, 79153964 + ... + 80252196.

It is an arithmetic number, because the mean of its divisors is an integer number (1590105552750).

Almost surely, 2^{87532552657640} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87532552657640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101766755376000).

87532552657640 is an abundant number, since it is smaller than the sum of its proper divisors (116000958094360).

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

87532552657640 is a wasteful number, since it uses less digits than its factorization.

87532552657640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098747 (or 1098743 counting only the distinct ones).

The product of its (nonzero) digits is 423360000, while the sum is 65.

The spelling of 87532552657640 in words is "eighty-seven trillion, five hundred thirty-two billion, five hundred fifty-two million, six hundred fifty-seven thousand, six hundred forty".