27805712145 has 8 divisors (see below), whose sum is σ = 44489139456. Its totient is φ = 14829713136.

The previous prime is 27805712119. The next prime is 27805712147. The reversal of 27805712145 is 54121750872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27805712145 - 2⁷ = 27805712017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27805712097 and 27805712106.

It is not an unprimeable number, because it can be changed into a prime (27805712147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926857057 + ... + 926857086.

It is an arithmetic number, because the mean of its divisors is an integer number (5561142432).

Almost surely, 2^27805712145 is an apocalyptic number.

It is an amenable number.

27805712145 is a deficient number, since it is larger than the sum of its proper divisors (16683427311).

27805712145 is a wasteful number, since it uses less digits than its factorization.

27805712145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853714151.

The product of its (nonzero) digits is 156800, while the sum is 42.

The spelling of 27805712145 in words is "twenty-seven billion, eight hundred five million, seven hundred twelve thousand, one hundred forty-five".