27891342423531 has 32 divisors (see below), whose sum is σ = 41338184832000. Its totient is φ = 18586275250464.

The previous prime is 27891342423481. The next prime is 27891342423551. The reversal of 27891342423531 is 13532424319872.

27891342423531 is a `hidden beast` number, since 2 + 7 + 89 + 1 + 3 + 4 + 2 + 4 + 23 + 531 = 666.

It is not a de Polignac number, because 27891342423531 - 2⁷ = 27891342423403 is a prime.

It is a super-2 number, since 2×27891342423531² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27891342423551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 669494580 + ... + 669536238.

It is an arithmetic number, because the mean of its divisors is an integer number (1291818276000).

Almost surely, 2^{27891342423531} is an apocalyptic number.

27891342423531 is a deficient number, since it is larger than the sum of its proper divisors (13446842408469).

27891342423531 is a wasteful number, since it uses less digits than its factorization.

27891342423531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51680 (or 51674 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 27891342423531 in words is "twenty-seven trillion, eight hundred ninety-one billion, three hundred forty-two million, four hundred twenty-three thousand, five hundred thirty-one".