5681958387653 has 2 divisors, whose sum is σ = 5681958387654. Its totient is φ = 5681958387652.

The previous prime is 5681958387649. The next prime is 5681958387689. The reversal of 5681958387653 is 3567838591865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5280587990209 + 401370397444 = 2297953^2 + 633538^2 .

It is a cyclic number.

It is not a de Polignac number, because 5681958387653 - 2² = 5681958387649 is a prime.

It is a super-2 number, since 2×5681958387653² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5681958387353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2840979193826 + 2840979193827.

It is an arithmetic number, because the mean of its divisors is an integer number (2840979193827).

Almost surely, 2^{5681958387653} is an apocalyptic number.

It is an amenable number.

5681958387653 is a deficient number, since it is larger than the sum of its proper divisors (1).

5681958387653 is an equidigital number, since it uses as much as digits as its factorization.

5681958387653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368000, while the sum is 74.

The spelling of 5681958387653 in words is "five trillion, six hundred eighty-one billion, nine hundred fifty-eight million, three hundred eighty-seven thousand, six hundred fifty-three".