531118101044389 has 2 divisors, whose sum is σ = 531118101044390. Its totient is φ = 531118101044388.

The previous prime is 531118101044387. The next prime is 531118101044423. The reversal of 531118101044389 is 983440101811135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 519179465960100 + 11938635084289 = 22785510^2 + 3455233^2 .

It is a cyclic number.

It is not a de Polignac number, because 531118101044389 - 2¹ = 531118101044387 is a prime.

Together with 531118101044387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531118101044381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265559050522194 + 265559050522195.

It is an arithmetic number, because the mean of its divisors is an integer number (265559050522195).

Almost surely, 2^{531118101044389} is an apocalyptic number.

It is an amenable number.

531118101044389 is a deficient number, since it is larger than the sum of its proper divisors (1).

531118101044389 is an equidigital number, since it uses as much as digits as its factorization.

531118101044389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 531118101044389 in words is "five hundred thirty-one trillion, one hundred eighteen billion, one hundred one million, forty-four thousand, three hundred eighty-nine".