5771485720621 has 2 divisors, whose sum is σ = 5771485720622. Its totient is φ = 5771485720620.

The previous prime is 5771485720591. The next prime is 5771485720633. The reversal of 5771485720621 is 1260275841775.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5269499300521 + 501986420100 = 2295539^2 + 708510^2 .

It is a cyclic number.

It is not a de Polignac number, because 5771485720621 - 2⁹ = 5771485720109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5771485720421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2885742860310 + 2885742860311.

It is an arithmetic number, because the mean of its divisors is an integer number (2885742860311).

Almost surely, 2^{5771485720621} is an apocalyptic number.

It is an amenable number.

5771485720621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5771485720621 is an equidigital number, since it uses as much as digits as its factorization.

5771485720621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6585600, while the sum is 55.

The spelling of 5771485720621 in words is "five trillion, seven hundred seventy-one billion, four hundred eighty-five million, seven hundred twenty thousand, six hundred twenty-one".