277852985609 has 2 divisors, whose sum is σ = 277852985610. Its totient is φ = 277852985608.

The previous prime is 277852985591. The next prime is 277852985623. The reversal of 277852985609 is 906589258772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201816577600 + 76036408009 = 449240^2 + 275747^2 .

It is a cyclic number.

It is not a de Polignac number, because 277852985609 - 2¹⁶ = 277852920073 is a prime.

It is a super-2 number, since 2×277852985609² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (277852985699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138926492804 + 138926492805.

It is an arithmetic number, because the mean of its divisors is an integer number (138926492805).

Almost surely, 2^277852985609 is an apocalyptic number.

It is an amenable number.

277852985609 is a deficient number, since it is larger than the sum of its proper divisors (1).

277852985609 is an equidigital number, since it uses as much as digits as its factorization.

277852985609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 152409600, while the sum is 68.

The spelling of 277852985609 in words is "two hundred seventy-seven billion, eight hundred fifty-two million, nine hundred eighty-five thousand, six hundred nine".