27082015138781 has 4 divisors (see below), whose sum is σ = 27082064870364. Its totient is φ = 27081965407200.

The previous prime is 27082015138769. The next prime is 27082015138813. The reversal of 27082015138781 is 18783151028072.

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 13563826068100 + 13518189070681 = 3682910^2 + 3676709^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27082015138781 is a prime.

It is a super-2 number, since 2×27082015138781² (a number of 28 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 (27082015138721) 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, 24039800 + ... + 25141121.

It is an arithmetic number, because the mean of its divisors is an integer number (6770516217591).

Almost surely, 2^{27082015138781} is an apocalyptic number.

It is an amenable number.

27082015138781 is a deficient number, since it is larger than the sum of its proper divisors (49731583).

27082015138781 is an equidigital number, since it uses as much as digits as its factorization.

27082015138781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49731582.

The product of its (nonzero) digits is 1505280, while the sum is 53.

The spelling of 27082015138781 in words is "twenty-seven trillion, eighty-two billion, fifteen million, one hundred thirty-eight thousand, seven hundred eighty-one".