27660555312 has 80 divisors (see below), whose sum is σ = 79032962400. Its totient is φ = 8280907776.

The previous prime is 27660555311. The next prime is 27660555359. The reversal of 27660555312 is 21355506672.

It is a super-2 number, since 2×27660555312² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27660555311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575937 + ... + 622112.

It is an arithmetic number, because the mean of its divisors is an integer number (987912030).

Almost surely, 2^27660555312 is an apocalyptic number.

It is an amenable number.

27660555312 is an abundant number, since it is smaller than the sum of its proper divisors (51372407088).

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

27660555312 is a wasteful number, since it uses less digits than its factorization.

27660555312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198110 (or 1198104 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 42.

The spelling of 27660555312 in words is "twenty-seven billion, six hundred sixty million, five hundred fifty-five thousand, three hundred twelve".