31446266389 has 2 divisors, whose sum is σ = 31446266390. Its totient is φ = 31446266388.

The previous prime is 31446266363. The next prime is 31446266479. The reversal of 31446266389 is 98366264413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21967686225 + 9478580164 = 148215^2 + 97358^2 .

It is a cyclic number.

It is not a de Polignac number, because 31446266389 - 2¹⁷ = 31446135317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31446266309) 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, 15723133194 + 15723133195.

It is an arithmetic number, because the mean of its divisors is an integer number (15723133195).

Almost surely, 2^31446266389 is an apocalyptic number.

It is an amenable number.

31446266389 is a deficient number, since it is larger than the sum of its proper divisors (1).

31446266389 is an equidigital number, since it uses as much as digits as its factorization.

31446266389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 52.

The spelling of 31446266389 in words is "thirty-one billion, four hundred forty-six million, two hundred sixty-six thousand, three hundred eighty-nine".