27726515849 has 4 divisors (see below), whose sum is σ = 27760704720. Its totient is φ = 27692326980.

The previous prime is 27726515819. The next prime is 27726515881. The reversal of 27726515849 is 94851562772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27726515849 - 2²⁸ = 27458080393 is a prime.

It is a super-2 number, since 2×27726515849² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27726515794 and 27726515803.

It is not an unprimeable number, because it can be changed into a prime (27726515819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17093219 + ... + 17094840.

It is an arithmetic number, because the mean of its divisors is an integer number (6940176180).

Almost surely, 2^27726515849 is an apocalyptic number.

It is an amenable number.

27726515849 is a deficient number, since it is larger than the sum of its proper divisors (34188871).

27726515849 is an equidigital number, since it uses as much as digits as its factorization.

27726515849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34188870.

The product of its digits is 8467200, while the sum is 56.

The spelling of 27726515849 in words is "twenty-seven billion, seven hundred twenty-six million, five hundred fifteen thousand, eight hundred forty-nine".