27403916265613 has 2 divisors, whose sum is σ = 27403916265614. Its totient is φ = 27403916265612.

The previous prime is 27403916265611. The next prime is 27403916265637. The reversal of 27403916265613 is 31656261930472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21331816975044 + 6072099290569 = 4618638^2 + 2464163^2 .

It is a cyclic number.

It is not a de Polignac number, because 27403916265613 - 2¹ = 27403916265611 is a prime.

Together with 27403916265611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27403916265611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13701958132806 + 13701958132807.

It is an arithmetic number, because the mean of its divisors is an integer number (13701958132807).

Almost surely, 2^{27403916265613} is an apocalyptic number.

It is an amenable number.

27403916265613 is a deficient number, since it is larger than the sum of its proper divisors (1).

27403916265613 is an equidigital number, since it uses as much as digits as its factorization.

27403916265613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 27403916265613 in words is "twenty-seven trillion, four hundred three billion, nine hundred sixteen million, two hundred sixty-five thousand, six hundred thirteen".