27012961357 has 2 divisors, whose sum is σ = 27012961358. Its totient is φ = 27012961356.

The previous prime is 27012961351. The next prime is 27012961387. The reversal of 27012961357 is 75316921072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26886488841 + 126472516 = 163971^2 + 11246^2 .

It is a cyclic number.

It is not a de Polignac number, because 27012961357 - 2¹⁹ = 27012437069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27012961351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13506480678 + 13506480679.

It is an arithmetic number, because the mean of its divisors is an integer number (13506480679).

Almost surely, 2^27012961357 is an apocalyptic number.

It is an amenable number.

27012961357 is a deficient number, since it is larger than the sum of its proper divisors (1).

27012961357 is an equidigital number, since it uses as much as digits as its factorization.

27012961357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 43.

The spelling of 27012961357 in words is "twenty-seven billion, twelve million, nine hundred sixty-one thousand, three hundred fifty-seven".