540557777 has 2 divisors, whose sum is σ = 540557778. Its totient is φ = 540557776.

The previous prime is 540557747. The next prime is 540557779. The reversal of 540557777 is 777755045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343323841 + 197233936 = 18529^2 + 14044^2 .

It is a cyclic number.

It is not a de Polignac number, because 540557777 - 2¹² = 540553681 is a prime.

Together with 540557779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (540557779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270278888 + 270278889.

It is an arithmetic number, because the mean of its divisors is an integer number (270278889).

Almost surely, 2^540557777 is an apocalyptic number.

It is an amenable number.

540557777 is a deficient number, since it is larger than the sum of its proper divisors (1).

540557777 is an equidigital number, since it uses as much as digits as its factorization.

540557777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200500, while the sum is 47.

The square root of 540557777 is about 23249.8984298857. The cubic root of 540557777 is about 814.6055662229.

The spelling of 540557777 in words is "five hundred forty million, five hundred fifty-seven thousand, seven hundred seventy-seven".