42847158067561 has 2 divisors, whose sum is σ = 42847158067562. Its totient is φ = 42847158067560.

The previous prime is 42847158067547. The next prime is 42847158067603. The reversal of 42847158067561 is 16576085174824.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27724237075161 + 15122920992400 = 5265381^2 + 3888820^2 .

It is a cyclic number.

It is not a de Polignac number, because 42847158067561 - 2⁵ = 42847158067529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42847158067493 and 42847158067502.

It is not a weakly prime, because it can be changed into another prime (42847158067531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21423579033780 + 21423579033781.

It is an arithmetic number, because the mean of its divisors is an integer number (21423579033781).

Almost surely, 2^{42847158067561} is an apocalyptic number.

It is an amenable number.

42847158067561 is a deficient number, since it is larger than the sum of its proper divisors (1).

42847158067561 is an equidigital number, since it uses as much as digits as its factorization.

42847158067561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90316800, while the sum is 64.

The spelling of 42847158067561 in words is "forty-two trillion, eight hundred forty-seven billion, one hundred fifty-eight million, sixty-seven thousand, five hundred sixty-one".