531161858003018 has 64 divisors (see below), whose sum is σ = 872620296912000. Its totient is φ = 240481795276800.

The previous prime is 531161858003003. The next prime is 531161858003081. The reversal of 531161858003018 is 810300858161135.

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 31 ways as a sum of consecutive naturals, for example, 20453676338 + ... + 20453702306.

It is an arithmetic number, because the mean of its divisors is an integer number (13634692139250).

Almost surely, 2^{531161858003018} is an apocalyptic number.

531161858003018 is a deficient number, since it is larger than the sum of its proper divisors (341458438908982).

531161858003018 is a wasteful number, since it uses less digits than its factorization.

531161858003018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29511.

The product of its (nonzero) digits is 691200, while the sum is 50.

The spelling of 531161858003018 in words is "five hundred thirty-one trillion, one hundred sixty-one billion, eight hundred fifty-eight million, three thousand, eighteen".