27155025647 has 4 divisors (see below), whose sum is σ = 28335678960. Its totient is φ = 25974372336.

The previous prime is 27155025643. The next prime is 27155025661. The reversal of 27155025647 is 74652055172.

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

It is a cyclic number.

It is not a de Polignac number, because 27155025647 - 2² = 27155025643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27155025598 and 27155025607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27155025643) 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, 590326622 + ... + 590326667.

It is an arithmetic number, because the mean of its divisors is an integer number (7083919740).

Almost surely, 2^27155025647 is an apocalyptic number.

27155025647 is a deficient number, since it is larger than the sum of its proper divisors (1180653313).

27155025647 is a wasteful number, since it uses less digits than its factorization.

27155025647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180653312.

The product of its (nonzero) digits is 588000, while the sum is 44.

The spelling of 27155025647 in words is "twenty-seven billion, one hundred fifty-five million, twenty-five thousand, six hundred forty-seven".