28531625021532 has 36 divisors (see below), whose sum is σ = 72145883159896. Its totient is φ = 9507340513440.

The previous prime is 28531625021531. The next prime is 28531625021671. The reversal of 28531625021532 is 23512052613582.

28531625021532 is a `hidden beast` number, since 2 + 8 + 5 + 3 + 1 + 62 + 50 + 2 + 1 + 532 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28531625021531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133273243 + ... + 133487154.

Almost surely, 2^{28531625021532} is an apocalyptic number.

It is an amenable number.

28531625021532 is an abundant number, since it is smaller than the sum of its proper divisors (43614258138364).

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

28531625021532 is a wasteful number, since it uses less digits than its factorization.

28531625021532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266763378 (or 266763373 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 28531625021532 in words is "twenty-eight trillion, five hundred thirty-one billion, six hundred twenty-five million, twenty-one thousand, five hundred thirty-two".