27771247077 has 64 divisors (see below), whose sum is σ = 45457152000. Its totient is φ = 14728117248.

The previous prime is 27771247043. The next prime is 27771247103. The reversal of 27771247077 is 77074217772.

It is a happy number.

It is not a de Polignac number, because 27771247077 - 2⁶ = 27771247013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27771247027) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7366449 + ... + 7370217.

It is an arithmetic number, because the mean of its divisors is an integer number (710268000).

Almost surely, 2^27771247077 is an apocalyptic number.

It is an amenable number.

27771247077 is a deficient number, since it is larger than the sum of its proper divisors (17685904923).

27771247077 is a wasteful number, since it uses less digits than its factorization.

27771247077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170.

The product of its (nonzero) digits is 1882384, while the sum is 51.

The spelling of 27771247077 in words is "twenty-seven billion, seven hundred seventy-one million, two hundred forty-seven thousand, seventy-seven".