334428576821 has 2 divisors, whose sum is σ = 334428576822. Its totient is φ = 334428576820.

The previous prime is 334428576799. The next prime is 334428576869. The reversal of 334428576821 is 128675824433.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297554976196 + 36873600625 = 545486^2 + 192025^2 .

It is a cyclic number.

It is not a de Polignac number, because 334428576821 - 2¹⁰ = 334428575797 is a prime.

It is a super-2 number, since 2×334428576821² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (334428576871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167214288410 + 167214288411.

It is an arithmetic number, because the mean of its divisors is an integer number (167214288411).

Almost surely, 2^334428576821 is an apocalyptic number.

It is an amenable number.

334428576821 is a deficient number, since it is larger than the sum of its proper divisors (1).

334428576821 is an equidigital number, since it uses as much as digits as its factorization.

334428576821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7741440, while the sum is 53.

The spelling of 334428576821 in words is "three hundred thirty-four billion, four hundred twenty-eight million, five hundred seventy-six thousand, eight hundred twenty-one".