27180749385 has 24 divisors (see below), whose sum is σ = 47117321160. Its totient is φ = 14495162112.

The previous prime is 27180749381. The next prime is 27180749411. The reversal of 27180749385 is 58394708172.

It is a happy number.

27180749385 is a `hidden beast` number, since 2 + 71 + 8 + 0 + 7 + 493 + 85 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8076257424 + 19104491961 = 89868^2 + 138219^2 .

It is not a de Polignac number, because 27180749385 - 2² = 27180749381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27180749381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 792717 + ... + 826293.

It is an arithmetic number, because the mean of its divisors is an integer number (1963221715).

Almost surely, 2^27180749385 is an apocalyptic number.

It is an amenable number.

27180749385 is a deficient number, since it is larger than the sum of its proper divisors (19936571775).

27180749385 is a wasteful number, since it uses less digits than its factorization.

27180749385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51577 (or 51574 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 27180749385 in words is "twenty-seven billion, one hundred eighty million, seven hundred forty-nine thousand, three hundred eighty-five".