5921637386389 has 2 divisors, whose sum is σ = 5921637386390. Its totient is φ = 5921637386388.

The previous prime is 5921637386383. The next prime is 5921637386411. The reversal of 5921637386389 is 9836837361295.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5920413576100 + 1223810289 = 2433190^2 + 34983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5921637386389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5921637386383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2960818693194 + 2960818693195.

It is an arithmetic number, because the mean of its divisors is an integer number (2960818693195).

Almost surely, 2^{5921637386389} is an apocalyptic number.

It is an amenable number.

5921637386389 is a deficient number, since it is larger than the sum of its proper divisors (1).

5921637386389 is an equidigital number, since it uses as much as digits as its factorization.

5921637386389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352719360, while the sum is 70.

The spelling of 5921637386389 in words is "five trillion, nine hundred twenty-one billion, six hundred thirty-seven million, three hundred eighty-six thousand, three hundred eighty-nine".