27866541431 has 2 divisors, whose sum is σ = 27866541432. Its totient is φ = 27866541430.

The previous prime is 27866541419. The next prime is 27866541511. The reversal of 27866541431 is 13414566872.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27866541431 is a prime.

It is a super-2 number, since 2×27866541431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27866541331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13933270715 + 13933270716.

It is an arithmetic number, because the mean of its divisors is an integer number (13933270716).

Almost surely, 2^27866541431 is an apocalyptic number.

27866541431 is a deficient number, since it is larger than the sum of its proper divisors (1).

27866541431 is an equidigital number, since it uses as much as digits as its factorization.

27866541431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 47.

The spelling of 27866541431 in words is "twenty-seven billion, eight hundred sixty-six million, five hundred forty-one thousand, four hundred thirty-one".