280785875532 has 12 divisors (see below), whose sum is σ = 655167042936. Its totient is φ = 93595291840.

The previous prime is 280785875509. The next prime is 280785875593. The reversal of 280785875532 is 235578587082.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11699411469 + ... + 11699411492.

It is an arithmetic number, because the mean of its divisors is an integer number (54597253578).

Almost surely, 2^280785875532 is an apocalyptic number.

It is an amenable number.

280785875532 is an abundant number, since it is smaller than the sum of its proper divisors (374381167404).

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

280785875532 is a wasteful number, since it uses less digits than its factorization.

280785875532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23398822968 (or 23398822966 counting only the distinct ones).

The product of its (nonzero) digits is 37632000, while the sum is 60.

The spelling of 280785875532 in words is "two hundred eighty billion, seven hundred eighty-five million, eight hundred seventy-five thousand, five hundred thirty-two".