531316164621601 has 4 divisors (see below), whose sum is σ = 531421941286912. Its totient is φ = 531210387956292.

The previous prime is 531316164621587. The next prime is 531316164621623. The reversal of 531316164621601 is 106126461613135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 531316164621601 - 2⁴⁵ = 496131792532769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531316164621691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52888325121 + ... + 52888335166.

It is an arithmetic number, because the mean of its divisors is an integer number (132855485321728).

Almost surely, 2^{531316164621601} is an apocalyptic number.

It is an amenable number.

531316164621601 is a deficient number, since it is larger than the sum of its proper divisors (105776665311).

531316164621601 is a wasteful number, since it uses less digits than its factorization.

531316164621601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105776665310.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 531316164621601 in words is "five hundred thirty-one trillion, three hundred sixteen billion, one hundred sixty-four million, six hundred twenty-one thousand, six hundred one".