5637872528621 has 2 divisors, whose sum is σ = 5637872528622. Its totient is φ = 5637872528620.

The previous prime is 5637872528611. The next prime is 5637872528647. The reversal of 5637872528621 is 1268252787365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3408495056521 + 2229377472100 = 1846211^2 + 1493110^2 .

It is a cyclic number.

It is not a de Polignac number, because 5637872528621 - 2¹⁰ = 5637872527597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5637872528611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2818936264310 + 2818936264311.

It is an arithmetic number, because the mean of its divisors is an integer number (2818936264311).

Almost surely, 2^{5637872528621} is an apocalyptic number.

It is an amenable number.

5637872528621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5637872528621 is an equidigital number, since it uses as much as digits as its factorization.

5637872528621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67737600, while the sum is 62.

The spelling of 5637872528621 in words is "five trillion, six hundred thirty-seven billion, eight hundred seventy-two million, five hundred twenty-eight thousand, six hundred twenty-one".