542220669761 has 2 divisors, whose sum is σ = 542220669762. Its totient is φ = 542220669760.

The previous prime is 542220669743. The next prime is 542220669763. The reversal of 542220669761 is 167966022245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 488958953536 + 53261716225 = 699256^2 + 230785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542220669761 is a prime.

It is a Sophie Germain prime.

Together with 542220669763, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (542220669763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271110334880 + 271110334881.

It is an arithmetic number, because the mean of its divisors is an integer number (271110334881).

Almost surely, 2^542220669761 is an apocalyptic number.

It is an amenable number.

542220669761 is a deficient number, since it is larger than the sum of its proper divisors (1).

542220669761 is an equidigital number, since it uses as much as digits as its factorization.

542220669761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 542220669761 in words is "five hundred forty-two billion, two hundred twenty million, six hundred sixty-nine thousand, seven hundred sixty-one".