27502752777397 has 2 divisors, whose sum is σ = 27502752777398. Its totient is φ = 27502752777396.

The previous prime is 27502752777391. The next prime is 27502752777439. The reversal of 27502752777397 is 79377725720572.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17255333834116 + 10247418943281 = 4153954^2 + 3201159^2 .

It is a cyclic number.

It is not a de Polignac number, because 27502752777397 - 2¹⁵ = 27502752744629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27502752777391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13751376388698 + 13751376388699.

It is an arithmetic number, because the mean of its divisors is an integer number (13751376388699).

Almost surely, 2^{27502752777397} is an apocalyptic number.

It is an amenable number.

27502752777397 is a deficient number, since it is larger than the sum of its proper divisors (1).

27502752777397 is an equidigital number, since it uses as much as digits as its factorization.

27502752777397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635304600, while the sum is 70.

The spelling of 27502752777397 in words is "twenty-seven trillion, five hundred two billion, seven hundred fifty-two million, seven hundred seventy-seven thousand, three hundred ninety-seven".