27806413513 has 4 divisors (see below), whose sum is σ = 27826149780. Its totient is φ = 27786677248.

The previous prime is 27806413507. The next prime is 27806413519. The reversal of 27806413513 is 31531460872.

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

It is an interprime number because it is at equal distance from previous prime (27806413507) and next prime (27806413519).

It can be written as a sum of positive squares in 2 ways, for example, as 10871815824 + 16934597689 = 104268^2 + 130133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27806413513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27806413519) 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, 9866020 + ... + 9868837.

It is an arithmetic number, because the mean of its divisors is an integer number (6956537445).

Almost surely, 2^27806413513 is an apocalyptic number.

It is an amenable number.

27806413513 is a deficient number, since it is larger than the sum of its proper divisors (19736267).

27806413513 is a wasteful number, since it uses less digits than its factorization.

27806413513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19736266.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 27806413513 in words is "twenty-seven billion, eight hundred six million, four hundred thirteen thousand, five hundred thirteen".