27257706013 has 4 divisors (see below), whose sum is σ = 28197626940. Its totient is φ = 26317785088.

The previous prime is 27257706001. The next prime is 27257706031. The reversal of 27257706013 is 31060775272.

It is a happy number.

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 14194816164 + 13062889849 = 119142^2 + 114293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27257706013 is a prime.

It is a super-2 number, since 2×27257706013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27257706053) 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 3 ways as a sum of consecutive naturals, for example, 469960420 + ... + 469960477.

It is an arithmetic number, because the mean of its divisors is an integer number (7049406735).

Almost surely, 2^27257706013 is an apocalyptic number.

It is an amenable number.

27257706013 is a deficient number, since it is larger than the sum of its proper divisors (939920927).

27257706013 is an equidigital number, since it uses as much as digits as its factorization.

27257706013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939920926.

The product of its (nonzero) digits is 123480, while the sum is 40.

The spelling of 27257706013 in words is "twenty-seven billion, two hundred fifty-seven million, seven hundred six thousand, thirteen".