42556337393 has 2 divisors, whose sum is σ = 42556337394. Its totient is φ = 42556337392.

The previous prime is 42556337377. The next prime is 42556337407. The reversal of 42556337393 is 39373365524.

42556337393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22139356849 + 20416980544 = 148793^2 + 142888^2 .

It is a cyclic number.

It is not a de Polignac number, because 42556337393 - 2⁴ = 42556337377 is a prime.

It is a super-2 number, since 2×42556337393² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42556330393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21278168696 + 21278168697.

It is an arithmetic number, because the mean of its divisors is an integer number (21278168697).

Almost surely, 2^42556337393 is an apocalyptic number.

It is an amenable number.

42556337393 is a deficient number, since it is larger than the sum of its proper divisors (1).

42556337393 is an equidigital number, since it uses as much as digits as its factorization.

42556337393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6123600, while the sum is 50.

The spelling of 42556337393 in words is "forty-two billion, five hundred fifty-six million, three hundred thirty-seven thousand, three hundred ninety-three".