27450445640 has 16 divisors (see below), whose sum is σ = 61763502780. Its totient is φ = 10980178240.

The previous prime is 27450445601. The next prime is 27450445667. The reversal of 27450445640 is 4654405472.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27427996996 + 22448644 = 165614^2 + 4738^2 .

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, 343130531 + ... + 343130610.

Almost surely, 2^27450445640 is an apocalyptic number.

27450445640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27450445640 is an abundant number, since it is smaller than the sum of its proper divisors (34313057140).

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

27450445640 is a wasteful number, since it uses less digits than its factorization.

27450445640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686261152 (or 686261148 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 41.

The spelling of 27450445640 in words is "twenty-seven billion, four hundred fifty million, four hundred forty-five thousand, six hundred forty".