27751401493 has 2 divisors, whose sum is σ = 27751401494. Its totient is φ = 27751401492.

The previous prime is 27751401481. The next prime is 27751401527. The reversal of 27751401493 is 39410415772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18272821329 + 9478580164 = 135177^2 + 97358^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27751401493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27751401473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13875700746 + 13875700747.

It is an arithmetic number, because the mean of its divisors is an integer number (13875700747).

Almost surely, 2^27751401493 is an apocalyptic number.

It is an amenable number.

27751401493 is a deficient number, since it is larger than the sum of its proper divisors (1).

27751401493 is an equidigital number, since it uses as much as digits as its factorization.

27751401493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 27751401493 in words is "twenty-seven billion, seven hundred fifty-one million, four hundred one thousand, four hundred ninety-three".