27751026077 has 4 divisors (see below), whose sum is σ = 27753022716. Its totient is φ = 27749029440.

The previous prime is 27751026071. The next prime is 27751026089. The reversal of 27751026077 is 77062015772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6314845156 + 21436180921 = 79466^2 + 146411^2 .

It is a cyclic number.

It is not a de Polignac number, because 27751026077 - 2⁸ = 27751025821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27751026071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977324 + ... + 1005317.

It is an arithmetic number, because the mean of its divisors is an integer number (6938255679).

Almost surely, 2^27751026077 is an apocalyptic number.

It is an amenable number.

27751026077 is a deficient number, since it is larger than the sum of its proper divisors (1996639).

27751026077 is a wasteful number, since it uses less digits than its factorization.

27751026077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996638.

The product of its (nonzero) digits is 288120, while the sum is 44.

The spelling of 27751026077 in words is "twenty-seven billion, seven hundred fifty-one million, twenty-six thousand, seventy-seven".