501731606631 has 16 divisors (see below), whose sum is σ = 673526448000. Its totient is φ = 332212660128.

The previous prime is 501731606609. The next prime is 501731606633. The reversal of 501731606631 is 136606137105.

It is a happy number.

It is not a de Polignac number, because 501731606631 - 2⁷ = 501731606503 is a prime.

It is a super-2 number, since 2×501731606631² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 501731606631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501731606633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5563780 + ... + 5653238.

It is an arithmetic number, because the mean of its divisors is an integer number (42095403000).

Almost surely, 2^501731606631 is an apocalyptic number.

501731606631 is a deficient number, since it is larger than the sum of its proper divisors (171794841369).

501731606631 is a wasteful number, since it uses less digits than its factorization.

501731606631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102158.

The product of its (nonzero) digits is 68040, while the sum is 39.

The spelling of 501731606631 in words is "five hundred one billion, seven hundred thirty-one million, six hundred six thousand, six hundred thirty-one".