27555691379 has 4 divisors (see below), whose sum is σ = 27698467176. Its totient is φ = 27412915584.

The previous prime is 27555691367. The next prime is 27555691399. The reversal of 27555691379 is 97319655572.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27555691379 - 2⁴ = 27555691363 is a prime.

It is a super-2 number, since 2×27555691379² (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 (27555691309) 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, 71387609 + ... + 71387994.

It is an arithmetic number, because the mean of its divisors is an integer number (6924616794).

Almost surely, 2^27555691379 is an apocalyptic number.

27555691379 is a deficient number, since it is larger than the sum of its proper divisors (142775797).

27555691379 is a wasteful number, since it uses less digits than its factorization.

27555691379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142775796.

The product of its digits is 17860500, while the sum is 59.

The spelling of 27555691379 in words is "twenty-seven billion, five hundred fifty-five million, six hundred ninety-one thousand, three hundred seventy-nine".