27854354509 has 2 divisors, whose sum is σ = 27854354510. Its totient is φ = 27854354508.

The previous prime is 27854354443. The next prime is 27854354519. The reversal of 27854354509 is 90545345872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21747400900 + 6106953609 = 147470^2 + 78147^2 .

It is a cyclic number.

It is not a de Polignac number, because 27854354509 - 2²¹ = 27852257357 is a prime.

It is a super-2 number, since 2×27854354509² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27854354519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13927177254 + 13927177255.

It is an arithmetic number, because the mean of its divisors is an integer number (13927177255).

Almost surely, 2^27854354509 is an apocalyptic number.

It is an amenable number.

27854354509 is a deficient number, since it is larger than the sum of its proper divisors (1).

27854354509 is an equidigital number, since it uses as much as digits as its factorization.

27854354509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 27854354509 in words is "twenty-seven billion, eight hundred fifty-four million, three hundred fifty-four thousand, five hundred nine".