27516733761557 has 2 divisors, whose sum is σ = 27516733761558. Its totient is φ = 27516733761556.

The previous prime is 27516733761499. The next prime is 27516733761683. The reversal of 27516733761557 is 75516733761572.

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., 16363311335281 + 11153422426276 = 4045159^2 + 3339674^2 .

It is a cyclic number.

It is not a de Polignac number, because 27516733761557 - 2⁸ = 27516733761301 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27516733761493 and 27516733761502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27516733761157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13758366880778 + 13758366880779.

It is an arithmetic number, because the mean of its divisors is an integer number (13758366880779).

Almost surely, 2^{27516733761557} is an apocalyptic number.

It is an amenable number.

27516733761557 is a deficient number, since it is larger than the sum of its proper divisors (1).

27516733761557 is an equidigital number, since it uses as much as digits as its factorization.

27516733761557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194481000, while the sum is 65.

The spelling of 27516733761557 in words is "twenty-seven trillion, five hundred sixteen billion, seven hundred thirty-three million, seven hundred sixty-one thousand, five hundred fifty-seven".