42074720257 has 2 divisors, whose sum is σ = 42074720258. Its totient is φ = 42074720256.

The previous prime is 42074720251. The next prime is 42074720273. The reversal of 42074720257 is 75202747024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36850177296 + 5224542961 = 191964^2 + 72281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42074720257 is a prime.

It is a super-2 number, since 2×42074720257² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42074720251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21037360128 + 21037360129.

It is an arithmetic number, because the mean of its divisors is an integer number (21037360129).

Almost surely, 2^42074720257 is an apocalyptic number.

It is an amenable number.

42074720257 is a deficient number, since it is larger than the sum of its proper divisors (1).

42074720257 is an equidigital number, since it uses as much as digits as its factorization.

42074720257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 219520, while the sum is 40.

The spelling of 42074720257 in words is "forty-two billion, seventy-four million, seven hundred twenty thousand, two hundred fifty-seven".