27427755440 has 20 divisors (see below), whose sum is σ = 63769531584. Its totient is φ = 10971102144.

The previous prime is 27427755431. The next prime is 27427755451. The reversal of 27427755440 is 4455772472.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171423392 + ... + 171423551.

Almost surely, 2^27427755440 is an apocalyptic number.

27427755440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27427755440 is an abundant number, since it is smaller than the sum of its proper divisors (36341776144).

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

27427755440 is a wasteful number, since it uses less digits than its factorization.

27427755440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342846956 (or 342846950 counting only the distinct ones).

The product of its (nonzero) digits is 2195200, while the sum is 47.

The spelling of 27427755440 in words is "twenty-seven billion, four hundred twenty-seven million, seven hundred fifty-five thousand, four hundred forty".