894361631881 has 2 divisors, whose sum is σ = 894361631882. Its totient is φ = 894361631880.

The previous prime is 894361631857. The next prime is 894361631887. The reversal of 894361631881 is 188136163498.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 776152190025 + 118209441856 = 880995^2 + 343816^2 .

It is a cyclic number.

It is not a de Polignac number, because 894361631881 - 2²⁷ = 894227414153 is a prime.

It is a super-2 number, since 2×894361631881² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (894361631887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447180815940 + 447180815941.

It is an arithmetic number, because the mean of its divisors is an integer number (447180815941).

Almost surely, 2^894361631881 is an apocalyptic number.

It is an amenable number.

894361631881 is a deficient number, since it is larger than the sum of its proper divisors (1).

894361631881 is an equidigital number, since it uses as much as digits as its factorization.

894361631881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5971968, while the sum is 58.

The spelling of 894361631881 in words is "eight hundred ninety-four billion, three hundred sixty-one million, six hundred thirty-one thousand, eight hundred eighty-one".