27802265137 has 4 divisors (see below), whose sum is σ = 29437692516. Its totient is φ = 26166837760.

The previous prime is 27802265093. The next prime is 27802265159. The reversal of 27802265137 is 73156220872.

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 18823565601 + 8978699536 = 137199^2 + 94756^2 .

It is a cyclic number.

It is not a de Polignac number, because 27802265137 - 2¹⁹ = 27801740849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27802265093 and 27802265102.

It is not an unprimeable number, because it can be changed into a prime (27802265167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817713664 + ... + 817713697.

It is an arithmetic number, because the mean of its divisors is an integer number (7359423129).

Almost surely, 2^27802265137 is an apocalyptic number.

It is an amenable number.

27802265137 is a deficient number, since it is larger than the sum of its proper divisors (1635427379).

27802265137 is a wasteful number, since it uses less digits than its factorization.

27802265137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635427378.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 27802265137 in words is "twenty-seven billion, eight hundred two million, two hundred sixty-five thousand, one hundred thirty-seven".