27071240381 has 2 divisors, whose sum is σ = 27071240382. Its totient is φ = 27071240380.

The previous prime is 27071240377. The next prime is 27071240407. The reversal of 27071240381 is 18304217072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26027368900 + 1043871481 = 161330^2 + 32309^2 .

It is a cyclic number.

It is not a de Polignac number, because 27071240381 - 2² = 27071240377 is a prime.

It is a super-2 number, since 2×27071240381² (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 (27071240311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13535620190 + 13535620191.

It is an arithmetic number, because the mean of its divisors is an integer number (13535620191).

Almost surely, 2^27071240381 is an apocalyptic number.

It is an amenable number.

27071240381 is a deficient number, since it is larger than the sum of its proper divisors (1).

27071240381 is an equidigital number, since it uses as much as digits as its factorization.

27071240381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 35.

The spelling of 27071240381 in words is "twenty-seven billion, seventy-one million, two hundred forty thousand, three hundred eighty-one".