27645506351 has 4 divisors (see below), whose sum is σ = 28847484912. Its totient is φ = 26443527792.

The previous prime is 27645506341. The next prime is 27645506353. The reversal of 27645506351 is 15360554672.

It is a happy number.

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 27645506351 - 2¹⁴ = 27645489967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27645506353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600989246 + ... + 600989291.

It is an arithmetic number, because the mean of its divisors is an integer number (7211871228).

Almost surely, 2^27645506351 is an apocalyptic number.

27645506351 is a deficient number, since it is larger than the sum of its proper divisors (1201978561).

27645506351 is a wasteful number, since it uses less digits than its factorization.

27645506351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201978560.

The product of its (nonzero) digits is 756000, while the sum is 44.

The spelling of 27645506351 in words is "twenty-seven billion, six hundred forty-five million, five hundred six thousand, three hundred fifty-one".