27493557660 has 144 divisors (see below), whose sum is σ = 85518276480. Its totient is φ = 7147284480.

The previous prime is 27493557653. The next prime is 27493557671. The reversal of 27493557660 is 6675539472.

27493557660 is a `hidden beast` number, since 2 + 7 + 4 + 9 + 3 + 5 + 576 + 60 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 27493557597 and 27493557606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1229661 + ... + 1251819.

It is an arithmetic number, because the mean of its divisors is an integer number (593876920).

Almost surely, 2^27493557660 is an apocalyptic number.

27493557660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27493557660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42759138240).

27493557660 is an abundant number, since it is smaller than the sum of its proper divisors (58024718820).

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

27493557660 is a wasteful number, since it uses less digits than its factorization.

27493557660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22348 (or 22343 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 54.

The spelling of 27493557660 in words is "twenty-seven billion, four hundred ninety-three million, five hundred fifty-seven thousand, six hundred sixty".