531873205878 has 64 divisors (see below), whose sum is σ = 1240674969600. Its totient is φ = 151944863616.

The previous prime is 531873205813. The next prime is 531873205879. The reversal of 531873205878 is 878502378135.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531873205879) 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 31 ways as a sum of consecutive naturals, for example, 32357950 + ... + 32374382.

It is an arithmetic number, because the mean of its divisors is an integer number (19385546400).

Almost surely, 2^531873205878 is an apocalyptic number.

531873205878 is an abundant number, since it is smaller than the sum of its proper divisors (708801763722).

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

531873205878 is a wasteful number, since it uses less digits than its factorization.

531873205878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32186 (or 32172 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 57.

The spelling of 531873205878 in words is "five hundred thirty-one billion, eight hundred seventy-three million, two hundred five thousand, eight hundred seventy-eight".