27064515157 has 4 divisors (see below), whose sum is σ = 27112080780. Its totient is φ = 27016949536.

The previous prime is 27064515143. The next prime is 27064515193. The reversal of 27064515157 is 75151546072.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7518797521 + 19545717636 = 86711^2 + 139806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27064515157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27064512157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23781958 + ... + 23783095.

It is an arithmetic number, because the mean of its divisors is an integer number (6778020195).

Almost surely, 2^27064515157 is an apocalyptic number.

It is an amenable number.

27064515157 is a deficient number, since it is larger than the sum of its proper divisors (47565623).

27064515157 is an equidigital number, since it uses as much as digits as its factorization.

27064515157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47565622.

The product of its (nonzero) digits is 294000, while the sum is 43.

The spelling of 27064515157 in words is "twenty-seven billion, sixty-four million, five hundred fifteen thousand, one hundred fifty-seven".