3776284420021 has 2 divisors, whose sum is σ = 3776284420022. Its totient is φ = 3776284420020.

The previous prime is 3776284420003. The next prime is 3776284420079. The reversal of 3776284420021 is 1200244826773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2974831552900 + 801452867121 = 1724770^2 + 895239^2 .

It is a cyclic number.

It is not a de Polignac number, because 3776284420021 - 2¹¹ = 3776284417973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3776284420421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1888142210010 + 1888142210011.

It is an arithmetic number, because the mean of its divisors is an integer number (1888142210011).

Almost surely, 2^{3776284420021} is an apocalyptic number.

It is an amenable number.

3776284420021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3776284420021 is an equidigital number, since it uses as much as digits as its factorization.

3776284420021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 46.

The spelling of 3776284420021 in words is "three trillion, seven hundred seventy-six billion, two hundred eighty-four million, four hundred twenty thousand, twenty-one".