27681540440 has 32 divisors (see below), whose sum is σ = 63213076080. Its totient is φ = 10907352192.

The previous prime is 27681540437. The next prime is 27681540457. The reversal of 27681540440 is 4404518672.

It is a super-2 number, since 2×27681540440² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5161787 + ... + 5167146.

Almost surely, 2^27681540440 is an apocalyptic number.

27681540440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27681540440 is an abundant number, since it is smaller than the sum of its proper divisors (35531535640).

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

27681540440 is a wasteful number, since it uses less digits than its factorization.

27681540440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10329011 (or 10329007 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 41.

The spelling of 27681540440 in words is "twenty-seven billion, six hundred eighty-one million, five hundred forty thousand, four hundred forty".