5771671952021 has 4 divisors (see below), whose sum is σ = 5772433695372. Its totient is φ = 5770910208672.

The previous prime is 5771671952017. The next prime is 5771671952027. The reversal of 5771671952021 is 1202591761775.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1760119623025 + 4011552328996 = 1326695^2 + 2002886^2 .

It is a cyclic number.

It is not a de Polignac number, because 5771671952021 - 2² = 5771671952017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5771671952027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380860310 + ... + 380875463.

It is an arithmetic number, because the mean of its divisors is an integer number (1443108423843).

Almost surely, 2^{5771671952021} is an apocalyptic number.

It is an amenable number.

5771671952021 is a deficient number, since it is larger than the sum of its proper divisors (761743351).

5771671952021 is an equidigital number, since it uses as much as digits as its factorization.

5771671952021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761743350.

The product of its (nonzero) digits is 1852200, while the sum is 53.

The spelling of 5771671952021 in words is "five trillion, seven hundred seventy-one billion, six hundred seventy-one million, nine hundred fifty-two thousand, twenty-one".