27732640013 has 4 divisors (see below), whose sum is σ = 29865920028. Its totient is φ = 25599360000.

The previous prime is 27732639947. The next prime is 27732640063. The reversal of 27732640013 is 31004623772.

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 2845368964 + 24887271049 = 53342^2 + 157757^2 .

It is a cyclic number.

It is not a de Polignac number, because 27732640013 - 2⁸ = 27732639757 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 (27732640063) 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, 1066639988 + ... + 1066640013.

It is an arithmetic number, because the mean of its divisors is an integer number (7466480007).

Almost surely, 2^27732640013 is an apocalyptic number.

It is an amenable number.

27732640013 is a deficient number, since it is larger than the sum of its proper divisors (2133280015).

27732640013 is a wasteful number, since it uses less digits than its factorization.

27732640013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133280014.

The product of its (nonzero) digits is 42336, while the sum is 35.

The spelling of 27732640013 in words is "twenty-seven billion, seven hundred thirty-two million, six hundred forty thousand, thirteen".