281878525312 has 64 divisors (see below), whose sum is σ = 567344073600. Its totient is φ = 139489910784.

The previous prime is 281878525297. The next prime is 281878525319. The reversal of 281878525312 is 213525878182.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 281878525312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281878525319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10241233 + ... + 10268719.

It is an arithmetic number, because the mean of its divisors is an integer number (8864751150).

Almost surely, 2^281878525312 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 281878525312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283672036800).

281878525312 is an abundant number, since it is smaller than the sum of its proper divisors (285465548288).

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

281878525312 is a wasteful number, since it uses less digits than its factorization.

281878525312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28323 (or 28311 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 52.

The spelling of 281878525312 in words is "two hundred eighty-one billion, eight hundred seventy-eight million, five hundred twenty-five thousand, three hundred twelve".