42608442257 has 2 divisors, whose sum is σ = 42608442258. Its totient is φ = 42608442256.

The previous prime is 42608442251. The next prime is 42608442307. The reversal of 42608442257 is 75224480624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36615205201 + 5993237056 = 191351^2 + 77416^2 .

It is a cyclic number.

It is not a de Polignac number, because 42608442257 - 2⁶ = 42608442193 is a prime.

It is not a weakly prime, because it can be changed into another prime (42608442251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21304221128 + 21304221129.

It is an arithmetic number, because the mean of its divisors is an integer number (21304221129).

Almost surely, 2^42608442257 is an apocalyptic number.

It is an amenable number.

42608442257 is a deficient number, since it is larger than the sum of its proper divisors (1).

42608442257 is an equidigital number, since it uses as much as digits as its factorization.

42608442257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 860160, while the sum is 44.

The spelling of 42608442257 in words is "forty-two billion, six hundred eight million, four hundred forty-two thousand, two hundred fifty-seven".