540006644657 has 2 divisors, whose sum is σ = 540006644658. Its totient is φ = 540006644656.

The previous prime is 540006644633. The next prime is 540006644677. The reversal of 540006644657 is 756446600045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 513686124961 + 26320519696 = 716719^2 + 162236^2 .

It is a cyclic number.

It is not a de Polignac number, because 540006644657 - 2²⁸ = 539738209201 is a prime.

It is a super-2 number, since 2×540006644657² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (540006644677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270003322328 + 270003322329.

It is an arithmetic number, because the mean of its divisors is an integer number (270003322329).

Almost surely, 2^540006644657 is an apocalyptic number.

It is an amenable number.

540006644657 is a deficient number, since it is larger than the sum of its proper divisors (1).

540006644657 is an equidigital number, since it uses as much as digits as its factorization.

540006644657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2419200, while the sum is 47.

The spelling of 540006644657 in words is "five hundred forty billion, six million, six hundred forty-four thousand, six hundred fifty-seven".