27663512431 has 2 divisors, whose sum is σ = 27663512432. Its totient is φ = 27663512430.

The previous prime is 27663512381. The next prime is 27663512483. The reversal of 27663512431 is 13421536672.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27663512431 - 2¹⁵ = 27663479663 is a prime.

It is a super-2 number, since 2×27663512431² (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 (27663512231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13831756215 + 13831756216.

It is an arithmetic number, because the mean of its divisors is an integer number (13831756216).

Almost surely, 2^27663512431 is an apocalyptic number.

27663512431 is a deficient number, since it is larger than the sum of its proper divisors (1).

27663512431 is an equidigital number, since it uses as much as digits as its factorization.

27663512431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 40.

The spelling of 27663512431 in words is "twenty-seven billion, six hundred sixty-three million, five hundred twelve thousand, four hundred thirty-one".