27121379513 has 4 divisors (see below), whose sum is σ = 28548820560. Its totient is φ = 25693938468.

The previous prime is 27121379497. The next prime is 27121379533. The reversal of 27121379513 is 31597312172.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27121379513 - 2⁴ = 27121379497 is a prime.

It is a super-2 number, since 2×27121379513² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27121379533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713720495 + ... + 713720532.

It is an arithmetic number, because the mean of its divisors is an integer number (7137205140).

Almost surely, 2^27121379513 is an apocalyptic number.

It is an amenable number.

27121379513 is a deficient number, since it is larger than the sum of its proper divisors (1427441047).

27121379513 is a wasteful number, since it uses less digits than its factorization.

27121379513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427441046.

The product of its digits is 79380, while the sum is 41.

The spelling of 27121379513 in words is "twenty-seven billion, one hundred twenty-one million, three hundred seventy-nine thousand, five hundred thirteen".