1528328252681 has 8 divisors (see below), whose sum is σ = 1559708963904. Its totient is φ = 1497199595760.

The previous prime is 1528328252669. The next prime is 1528328252701. The reversal of 1528328252681 is 1862528238251.

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 1528328252681 - 2¹⁸ = 1528327990537 is a prime.

It is a super-2 number, since 2×1528328252681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1528328252611) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 63001325 + ... + 63025578.

It is an arithmetic number, because the mean of its divisors is an integer number (194963620488).

Almost surely, 2^{1528328252681} is an apocalyptic number.

It is an amenable number.

1528328252681 is a deficient number, since it is larger than the sum of its proper divisors (31380711223).

1528328252681 is a wasteful number, since it uses less digits than its factorization.

1528328252681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126027151.

The product of its digits is 3686400, while the sum is 53.

The spelling of 1528328252681 in words is "one trillion, five hundred twenty-eight billion, three hundred twenty-eight million, two hundred fifty-two thousand, six hundred eighty-one".