27075777557 has 2 divisors, whose sum is σ = 27075777558. Its totient is φ = 27075777556.

The previous prime is 27075777541. The next prime is 27075777653. The reversal of 27075777557 is 75577757072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19121634961 + 7954142596 = 138281^2 + 89186^2 .

It is a cyclic number.

It is not a de Polignac number, because 27075777557 - 2⁴ = 27075777541 is a prime.

It is a super-2 number, since 2×27075777557² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27075777496 and 27075777505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27075777257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13537888778 + 13537888779.

It is an arithmetic number, because the mean of its divisors is an integer number (13537888779).

Almost surely, 2^27075777557 is an apocalyptic number.

It is an amenable number.

27075777557 is a deficient number, since it is larger than the sum of its proper divisors (1).

27075777557 is an equidigital number, since it uses as much as digits as its factorization.

27075777557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29412250, while the sum is 59.

The spelling of 27075777557 in words is "twenty-seven billion, seventy-five million, seven hundred seventy-seven thousand, five hundred fifty-seven".