5600400389981 has 2 divisors, whose sum is σ = 5600400389982. Its totient is φ = 5600400389980.

The previous prime is 5600400389971. The next prime is 5600400390017. The reversal of 5600400389981 is 1899830040065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3090092873956 + 2510307516025 = 1757866^2 + 1584395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5600400389981 is a prime.

It is a super-2 number, since 2×5600400389981² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5600400389971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2800200194990 + 2800200194991.

It is an arithmetic number, because the mean of its divisors is an integer number (2800200194991).

Almost surely, 2^{5600400389981} is an apocalyptic number.

It is an amenable number.

5600400389981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5600400389981 is an equidigital number, since it uses as much as digits as its factorization.

5600400389981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 5600400389981 in words is "five trillion, six hundred billion, four hundred million, three hundred eighty-nine thousand, nine hundred eighty-one".