27742143553 has 2 divisors, whose sum is σ = 27742143554. Its totient is φ = 27742143552.

The previous prime is 27742143509. The next prime is 27742143571. The reversal of 27742143553 is 35534124772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17963504784 + 9778638769 = 134028^2 + 98887^2 .

It is a cyclic number.

It is not a de Polignac number, because 27742143553 - 2²⁹ = 27205272641 is a prime.

It is not a weakly prime, because it can be changed into another prime (27742143593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13871071776 + 13871071777.

It is an arithmetic number, because the mean of its divisors is an integer number (13871071777).

Almost surely, 2^27742143553 is an apocalyptic number.

It is an amenable number.

27742143553 is a deficient number, since it is larger than the sum of its proper divisors (1).

27742143553 is an equidigital number, since it uses as much as digits as its factorization.

27742143553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 43.

The spelling of 27742143553 in words is "twenty-seven billion, seven hundred forty-two million, one hundred forty-three thousand, five hundred fifty-three".