531985996146 has 32 divisors (see below), whose sum is σ = 1163984862528. Its totient is φ = 160751191040.

The previous prime is 531985996123. The next prime is 531985996163. The reversal of 531985996146 is 641699589135.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11393691 + ... + 11440286.

It is an arithmetic number, because the mean of its divisors is an integer number (36374526954).

Almost surely, 2^531985996146 is an apocalyptic number.

531985996146 is an abundant number, since it is smaller than the sum of its proper divisors (631998866382).

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

531985996146 is a wasteful number, since it uses less digits than its factorization.

531985996146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22834346.

The product of its digits is 62985600, while the sum is 66.

The spelling of 531985996146 in words is "five hundred thirty-one billion, nine hundred eighty-five million, nine hundred ninety-six thousand, one hundred forty-six".