501111313515643 has 2 divisors, whose sum is σ = 501111313515644. Its totient is φ = 501111313515642.

The previous prime is 501111313515563. The next prime is 501111313515649. The reversal of 501111313515643 is 346515313111105.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 501111313515643 - 2⁴¹ = 498912290260091 is a prime.

It is a super-2 number, since 2×501111313515643² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 501111313515596 and 501111313515605.

It is not a weakly prime, because it can be changed into another prime (501111313515649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250555656757821 + 250555656757822.

It is an arithmetic number, because the mean of its divisors is an integer number (250555656757822).

Almost surely, 2^{501111313515643} is an apocalyptic number.

501111313515643 is a deficient number, since it is larger than the sum of its proper divisors (1).

501111313515643 is an equidigital number, since it uses as much as digits as its factorization.

501111313515643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 40.

Adding to 501111313515643 its reverse (346515313111105), we get a palindrome (847626626626748).

The spelling of 501111313515643 in words is "five hundred one trillion, one hundred eleven billion, three hundred thirteen million, five hundred fifteen thousand, six hundred forty-three".