31163304551789 has 2 divisors, whose sum is σ = 31163304551790. Its totient is φ = 31163304551788.

The previous prime is 31163304551741. The next prime is 31163304551933. The reversal of 31163304551789 is 98715540336113.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23779764602500 + 7383539949289 = 4876450^2 + 2717267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31163304551789 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31163364551789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15581652275894 + 15581652275895.

It is an arithmetic number, because the mean of its divisors is an integer number (15581652275895).

Almost surely, 2^{31163304551789} is an apocalyptic number.

It is an amenable number.

31163304551789 is a deficient number, since it is larger than the sum of its proper divisors (1).

31163304551789 is an equidigital number, since it uses as much as digits as its factorization.

31163304551789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8164800, while the sum is 56.

The spelling of 31163304551789 in words is "thirty-one trillion, one hundred sixty-three billion, three hundred four million, five hundred fifty-one thousand, seven hundred eighty-nine".