27512651513 has 4 divisors (see below), whose sum is σ = 27513109620. Its totient is φ = 27512193408.

The previous prime is 27512651473. The next prime is 27512651581. The reversal of 27512651513 is 31515621572.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7815090409 + 19697561104 = 88403^2 + 140348^2 .

It is a cyclic number.

It is not a de Polignac number, because 27512651513 - 2⁶ = 27512651449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27512651813) 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, 122420 + ... + 264597.

It is an arithmetic number, because the mean of its divisors is an integer number (6878277405).

Almost surely, 2^27512651513 is an apocalyptic number.

It is an amenable number.

27512651513 is a deficient number, since it is larger than the sum of its proper divisors (458107).

27512651513 is an equidigital number, since it uses as much as digits as its factorization.

27512651513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458106.

The product of its digits is 63000, while the sum is 38.

The spelling of 27512651513 in words is "twenty-seven billion, five hundred twelve million, six hundred fifty-one thousand, five hundred thirteen".