540064361989 has 2 divisors, whose sum is σ = 540064361990. Its totient is φ = 540064361988.

The previous prime is 540064361987. The next prime is 540064362043. The reversal of 540064361989 is 989163460045.

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., 539979537889 + 84824100 = 734833^2 + 9210^2 .

It is a cyclic number.

It is not a de Polignac number, because 540064361989 - 2¹ = 540064361987 is a prime.

It is a super-2 number, since 2×540064361989² (a number of 24 digits) contains 22 as substring.

Together with 540064361987, 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 (540064361987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270032180994 + 270032180995.

It is an arithmetic number, because the mean of its divisors is an integer number (270032180995).

Almost surely, 2^540064361989 is an apocalyptic number.

It is an amenable number.

540064361989 is a deficient number, since it is larger than the sum of its proper divisors (1).

540064361989 is an equidigital number, since it uses as much as digits as its factorization.

540064361989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 540064361989 in words is "five hundred forty billion, sixty-four million, three hundred sixty-one thousand, nine hundred eighty-nine".