27436252381 has 2 divisors, whose sum is σ = 27436252382. Its totient is φ = 27436252380.

The previous prime is 27436252289. The next prime is 27436252399. The reversal of 27436252381 is 18325263472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24935252281 + 2501000100 = 157909^2 + 50010^2 .

It is a cyclic number.

It is not a de Polignac number, because 27436252381 - 2¹¹ = 27436250333 is a prime.

It is a super-2 number, since 2×27436252381² (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 (27436250381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13718126190 + 13718126191.

It is an arithmetic number, because the mean of its divisors is an integer number (13718126191).

Almost surely, 2^27436252381 is an apocalyptic number.

It is an amenable number.

27436252381 is a deficient number, since it is larger than the sum of its proper divisors (1).

27436252381 is an equidigital number, since it uses as much as digits as its factorization.

27436252381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 43.

The spelling of 27436252381 in words is "twenty-seven billion, four hundred thirty-six million, two hundred fifty-two thousand, three hundred eighty-one".