5168438983621 has 2 divisors, whose sum is σ = 5168438983622. Its totient is φ = 5168438983620.

The previous prime is 5168438983583. The next prime is 5168438983661. The reversal of 5168438983621 is 1263898348615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4644516352996 + 523922630625 = 2155114^2 + 723825^2 .

It is a cyclic number.

It is not a de Polignac number, because 5168438983621 - 2⁷ = 5168438983493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5168438983661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2584219491810 + 2584219491811.

It is an arithmetic number, because the mean of its divisors is an integer number (2584219491811).

Almost surely, 2^{5168438983621} is an apocalyptic number.

It is an amenable number.

5168438983621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5168438983621 is an equidigital number, since it uses as much as digits as its factorization.

5168438983621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59719680, while the sum is 64.

The spelling of 5168438983621 in words is "five trillion, one hundred sixty-eight billion, four hundred thirty-eight million, nine hundred eighty-three thousand, six hundred twenty-one".