5661737863841 has 2 divisors, whose sum is σ = 5661737863842. Its totient is φ = 5661737863840.

The previous prime is 5661737863829. The next prime is 5661737863877. The reversal of 5661737863841 is 1483687371665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5438690410000 + 223047453841 = 2332100^2 + 472279^2 .

It is a cyclic number.

It is not a de Polignac number, because 5661737863841 - 2¹⁰ = 5661737862817 is a prime.

It is not a weakly prime, because it can be changed into another prime (5661737853841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830868931920 + 2830868931921.

It is an arithmetic number, because the mean of its divisors is an integer number (2830868931921).

Almost surely, 2^{5661737863841} is an apocalyptic number.

It is an amenable number.

5661737863841 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661737863841 is an equidigital number, since it uses as much as digits as its factorization.

5661737863841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121927680, while the sum is 65.

The spelling of 5661737863841 in words is "five trillion, six hundred sixty-one billion, seven hundred thirty-seven million, eight hundred sixty-three thousand, eight hundred forty-one".