1532887897728 has 128 divisors (see below), whose sum is σ = 4460957841600. Its totient is φ = 462517575680.

The previous prime is 1532887897561. The next prime is 1532887897777. The reversal of 1532887897728 is 8277987882351.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 1532887897728.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 205438 + ... + 1762946.

Almost surely, 2^{1532887897728} 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 1532887897728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2230478920800).

1532887897728 is an abundant number, since it is smaller than the sum of its proper divisors (2928069943872).

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

1532887897728 is a wasteful number, since it uses less digits than its factorization.

1532887897728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557770 (or 1557758 counting only the distinct ones).

The product of its digits is 758661120, while the sum is 75.

The spelling of 1532887897728 in words is "one trillion, five hundred thirty-two billion, eight hundred eighty-seven million, eight hundred ninety-seven thousand, seven hundred twenty-eight".