128586868885 has 8 divisors (see below), whose sum is σ = 154308242520. Its totient is φ = 102866828544.

The previous prime is 128586868873. The next prime is 128586868919. The reversal of 128586868885 is 588868685821.

It can be written as a sum of positive squares in 4 ways, for example, as 35497197649 + 93089671236 = 188407^2 + 305106^2 .

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 128586868885 - 2¹⁵ = 128586836117 is a prime.

It is a super-2 number, since 2×128586868885² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107200 + ... + 518329.

It is an arithmetic number, because the mean of its divisors is an integer number (19288530315).

Almost surely, 2^128586868885 is an apocalyptic number.

It is an amenable number.

128586868885 is a deficient number, since it is larger than the sum of its proper divisors (25721373635).

128586868885 is an equidigital number, since it uses as much as digits as its factorization.

128586868885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666647.

The product of its digits is 471859200, while the sum is 73.

The spelling of 128586868885 in words is "one hundred twenty-eight billion, five hundred eighty-six million, eight hundred sixty-eight thousand, eight hundred eighty-five".