42440422657 has 2 divisors, whose sum is σ = 42440422658. Its totient is φ = 42440422656.

The previous prime is 42440422643. The next prime is 42440422681. The reversal of 42440422657 is 75622404424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36434792641 + 6005630016 = 190879^2 + 77496^2 .

It is a cyclic number.

It is not a de Polignac number, because 42440422657 - 2³¹ = 40292939009 is a prime.

It is not a weakly prime, because it can be changed into another prime (42440422627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21220211328 + 21220211329.

It is an arithmetic number, because the mean of its divisors is an integer number (21220211329).

Almost surely, 2^42440422657 is an apocalyptic number.

It is an amenable number.

42440422657 is a deficient number, since it is larger than the sum of its proper divisors (1).

42440422657 is an equidigital number, since it uses as much as digits as its factorization.

42440422657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 40.

The spelling of 42440422657 in words is "forty-two billion, four hundred forty million, four hundred twenty-two thousand, six hundred fifty-seven".