27487217137 has 16 divisors (see below), whose sum is σ = 28203029712. Its totient is φ = 26781189120.

The previous prime is 27487217111. The next prime is 27487217209. The reversal of 27487217137 is 73171278472.

It can be written as a sum of positive squares in 8 ways, for example, as 1225070001 + 26262147136 = 35001^2 + 162056^2 .

It is a cyclic number.

It is not a de Polignac number, because 27487217137 - 2¹⁵ = 27487184369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27487217837) 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, 2795053 + ... + 2804869.

It is an arithmetic number, because the mean of its divisors is an integer number (1762689357).

Almost surely, 2^27487217137 is an apocalyptic number.

It is an amenable number.

27487217137 is a deficient number, since it is larger than the sum of its proper divisors (715812575).

27487217137 is a wasteful number, since it uses less digits than its factorization.

27487217137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10308.

The product of its digits is 921984, while the sum is 49.

The spelling of 27487217137 in words is "twenty-seven billion, four hundred eighty-seven million, two hundred seventeen thousand, one hundred thirty-seven".