27770215145 has 16 divisors (see below), whose sum is σ = 33418344960. Its totient is φ = 22153540224.

The previous prime is 27770215129. The next prime is 27770215171. The reversal of 27770215145 is 54151207772.

It is a cyclic number.

It is not a de Polignac number, because 27770215145 - 2⁴ = 27770215129 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2750216 + ... + 2760294.

It is an arithmetic number, because the mean of its divisors is an integer number (2088646560).

Almost surely, 2^27770215145 is an apocalyptic number.

It is an amenable number.

27770215145 is a deficient number, since it is larger than the sum of its proper divisors (5648129815).

27770215145 is a wasteful number, since it uses less digits than its factorization.

27770215145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11584.

The product of its (nonzero) digits is 137200, while the sum is 41.

The spelling of 27770215145 in words is "twenty-seven billion, seven hundred seventy million, two hundred fifteen thousand, one hundred forty-five".