27212135145 has 16 divisors (see below), whose sum is σ = 46888602432. Its totient is φ = 13396743360.

The previous prime is 27212135113. The next prime is 27212135147. The reversal of 27212135145 is 54153121272.

It is a happy number.

It is not a de Polignac number, because 27212135145 - 2⁵ = 27212135113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27212135147) 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, 69774511 + ... + 69774900.

It is an arithmetic number, because the mean of its divisors is an integer number (2930537652).

Almost surely, 2^27212135145 is an apocalyptic number.

It is an amenable number.

27212135145 is a deficient number, since it is larger than the sum of its proper divisors (19676467287).

27212135145 is a wasteful number, since it uses less digits than its factorization.

27212135145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139549432.

The product of its digits is 16800, while the sum is 33.

The spelling of 27212135145 in words is "twenty-seven billion, two hundred twelve million, one hundred thirty-five thousand, one hundred forty-five".