27640505213 has 8 divisors (see below), whose sum is σ = 27967099776. Its totient is φ = 27315662400.

The previous prime is 27640505209. The next prime is 27640505237. The reversal of 27640505213 is 31250504672.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27640505213 - 2² = 27640505209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27640505813) 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 7 ways as a sum of consecutive naturals, for example, 406181 + ... + 469322.

It is an arithmetic number, because the mean of its divisors is an integer number (3495887472).

Almost surely, 2^27640505213 is an apocalyptic number.

It is an amenable number.

27640505213 is a deficient number, since it is larger than the sum of its proper divisors (326594563).

27640505213 is a wasteful number, since it uses less digits than its factorization.

27640505213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875875.

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 27640505213 in words is "twenty-seven billion, six hundred forty million, five hundred five thousand, two hundred thirteen".