87878801573 has 8 divisors (see below), whose sum is σ = 93209415192. Its totient is φ = 82566107136.

The previous prime is 87878801561. The next prime is 87878801597. The reversal of 87878801573 is 37510887878.

It can be written as a sum of positive squares in 4 ways, for example, as 51766260484 + 36112541089 = 227522^2 + 190033^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 87878801573 - 2⁸ = 87878801317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87878801873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4469690 + ... + 4489307.

It is an arithmetic number, because the mean of its divisors is an integer number (11651176899).

Almost surely, 2^87878801573 is an apocalyptic number.

It is an amenable number.

87878801573 is a deficient number, since it is larger than the sum of its proper divisors (5330613619).

87878801573 is a wasteful number, since it uses less digits than its factorization.

87878801573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8959591.

The product of its (nonzero) digits is 21073920, while the sum is 62.

The spelling of 87878801573 in words is "eighty-seven billion, eight hundred seventy-eight million, eight hundred one thousand, five hundred seventy-three".