27954875195381 has 2 divisors, whose sum is σ = 27954875195382. Its totient is φ = 27954875195380.

The previous prime is 27954875195329. The next prime is 27954875195407. The reversal of 27954875195381 is 18359157845972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26344958314756 + 1609916880625 = 5132734^2 + 1268825^2 .

It is a cyclic number.

It is not a de Polignac number, because 27954875195381 - 2²² = 27954871001077 is a prime.

It is a super-2 number, since 2×27954875195381² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27954875195299 and 27954875195308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27954875195311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13977437597690 + 13977437597691.

It is an arithmetic number, because the mean of its divisors is an integer number (13977437597691).

Almost surely, 2^{27954875195381} is an apocalyptic number.

It is an amenable number.

27954875195381 is a deficient number, since it is larger than the sum of its proper divisors (1).

27954875195381 is an equidigital number, since it uses as much as digits as its factorization.

27954875195381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048000, while the sum is 74.

The spelling of 27954875195381 in words is "twenty-seven trillion, nine hundred fifty-four billion, eight hundred seventy-five million, one hundred ninety-five thousand, three hundred eighty-one".