27775427772 has 12 divisors (see below), whose sum is σ = 64809331496. Its totient is φ = 9258475920.

The previous prime is 27775427677. The next prime is 27775427777. The reversal of 27775427772 is 27772457772.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27775427777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157309479 + ... + 1157309502.

Almost surely, 2^27775427772 is an apocalyptic number.

It is an amenable number.

27775427772 is an abundant number, since it is smaller than the sum of its proper divisors (37033903724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27775427772 is a wasteful number, since it uses less digits than its factorization.

27775427772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314618988 (or 2314618986 counting only the distinct ones).

The product of its digits is 18823840, while the sum is 57.

The spelling of 27775427772 in words is "twenty-seven billion, seven hundred seventy-five million, four hundred twenty-seven thousand, seven hundred seventy-two".