542155777 has 2 divisors, whose sum is σ = 542155778. Its totient is φ = 542155776.

The previous prime is 542155771. The next prime is 542155811. The reversal of 542155777 is 777551245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 532271041 + 9884736 = 23071^2 + 3144^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542155777 is a prime.

It is not a weakly prime, because it can be changed into another prime (542155771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271077888 + 271077889.

It is an arithmetic number, because the mean of its divisors is an integer number (271077889).

Almost surely, 2^542155777 is an apocalyptic number.

It is an amenable number.

542155777 is a deficient number, since it is larger than the sum of its proper divisors (1).

542155777 is an equidigital number, since it uses as much as digits as its factorization.

542155777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 343000, while the sum is 43.

The square root of 542155777 is about 23284.2388108351. The cubic root of 542155777 is about 815.4074904056.

The spelling of 542155777 in words is "five hundred forty-two million, one hundred fifty-five thousand, seven hundred seventy-seven".