27768862357 has 2 divisors, whose sum is σ = 27768862358. Its totient is φ = 27768862356.

The previous prime is 27768862309. The next prime is 27768862393. The reversal of 27768862357 is 75326886772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21665190481 + 6103671876 = 147191^2 + 78126^2 .

It is a cyclic number.

It is not a de Polignac number, because 27768862357 - 2¹⁵ = 27768829589 is a prime.

It is a super-2 number, since 2×27768862357² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27768862295 and 27768862304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27768865357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13884431178 + 13884431179.

It is an arithmetic number, because the mean of its divisors is an integer number (13884431179).

Almost surely, 2^27768862357 is an apocalyptic number.

It is an amenable number.

27768862357 is a deficient number, since it is larger than the sum of its proper divisors (1).

27768862357 is an equidigital number, since it uses as much as digits as its factorization.

27768862357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47416320, while the sum is 61.

The spelling of 27768862357 in words is "twenty-seven billion, seven hundred sixty-eight million, eight hundred sixty-two thousand, three hundred fifty-seven".