27825778049 has 4 divisors (see below), whose sum is σ = 27826137264. Its totient is φ = 27825418836.

The previous prime is 27825778039. The next prime is 27825778067. The reversal of 27825778049 is 94087752872.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 27825778049 - 2¹⁶ = 27825712513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27825778009) 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, 10067 + ... + 236120.

It is an arithmetic number, because the mean of its divisors is an integer number (6956534316).

Almost surely, 2^27825778049 is an apocalyptic number.

It is an amenable number.

27825778049 is a deficient number, since it is larger than the sum of its proper divisors (359215).

27825778049 is a wasteful number, since it uses less digits than its factorization.

27825778049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359214.

The product of its (nonzero) digits is 15805440, while the sum is 59.

The spelling of 27825778049 in words is "twenty-seven billion, eight hundred twenty-five million, seven hundred seventy-eight thousand, forty-nine".