671084802881 has 2 divisors, whose sum is σ = 671084802882. Its totient is φ = 671084802880.

The previous prime is 671084802841. The next prime is 671084802923. The reversal of 671084802881 is 188208480176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 414356127025 + 256728675856 = 643705^2 + 506684^2 .

It is a cyclic number.

It is not a de Polignac number, because 671084802881 - 2¹⁴ = 671084786497 is a prime.

It is a super-2 number, since 2×671084802881² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (671084802841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335542401440 + 335542401441.

It is an arithmetic number, because the mean of its divisors is an integer number (335542401441).

Almost surely, 2^671084802881 is an apocalyptic number.

It is an amenable number.

671084802881 is a deficient number, since it is larger than the sum of its proper divisors (1).

671084802881 is an equidigital number, since it uses as much as digits as its factorization.

671084802881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1376256, while the sum is 53.

The spelling of 671084802881 in words is "six hundred seventy-one billion, eighty-four million, eight hundred two thousand, eight hundred eighty-one".