27385856660 has 48 divisors (see below), whose sum is σ = 60259997952. Its totient is φ = 10434547200.

The previous prime is 27385856653. The next prime is 27385856677. The reversal of 27385856660 is 6665858372.

It is a junction number, because it is equal to n+sod(n) for n = 27385856596 and 27385856605.

It is a congruent number.

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, 12656 + ... + 234375.

It is an arithmetic number, because the mean of its divisors is an integer number (1255416624).

Almost surely, 2^27385856660 is an apocalyptic number.

27385856660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27385856660 is an abundant number, since it is smaller than the sum of its proper divisors (32874141292).

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

27385856660 is a wasteful number, since it uses less digits than its factorization.

27385856660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247304 (or 247302 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 27385856660 in words is "twenty-seven billion, three hundred eighty-five million, eight hundred fifty-six thousand, six hundred sixty".