27456538440 has 64 divisors (see below), whose sum is σ = 82673660160. Its totient is φ = 7294717440.

The previous prime is 27456538399. The next prime is 27456538453. The reversal of 27456538440 is 4483565472.

It is a self number, because there is not a number n which added to its sum of digits gives 27456538440.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389629 + ... + 454668.

It is an arithmetic number, because the mean of its divisors is an integer number (1291775940).

Almost surely, 2^27456538440 is an apocalyptic number.

27456538440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27456538440 is an abundant number, since it is smaller than the sum of its proper divisors (55217121720).

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

27456538440 is a wasteful number, since it uses less digits than its factorization.

27456538440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844582 (or 844578 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 48.

The spelling of 27456538440 in words is "twenty-seven billion, four hundred fifty-six million, five hundred thirty-eight thousand, four hundred forty".