7427042720057 has 2 divisors, whose sum is σ = 7427042720058. Its totient is φ = 7427042720056.

The previous prime is 7427042719979. The next prime is 7427042720081. The reversal of 7427042720057 is 7500272407247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6528990825721 + 898051894336 = 2555189^2 + 947656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7427042720057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7427042719993 and 7427042720020.

It is not a weakly prime, because it can be changed into another prime (7427042728057) 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, 3713521360028 + 3713521360029.

It is an arithmetic number, because the mean of its divisors is an integer number (3713521360029).

Almost surely, 2^{7427042720057} is an apocalyptic number.

It is an amenable number.

7427042720057 is a deficient number, since it is larger than the sum of its proper divisors (1).

7427042720057 is an equidigital number, since it uses as much as digits as its factorization.

7427042720057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536640, while the sum is 47.

The spelling of 7427042720057 in words is "seven trillion, four hundred twenty-seven billion, forty-two million, seven hundred twenty thousand, fifty-seven".