42591335057 has 2 divisors, whose sum is σ = 42591335058. Its totient is φ = 42591335056.

The previous prime is 42591334987. The next prime is 42591335077. The reversal of 42591335057 is 75053319524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38852746321 + 3738588736 = 197111^2 + 61144^2 .

It is a cyclic number.

It is not a de Polignac number, because 42591335057 - 2⁸ = 42591334801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42591334999 and 42591335017.

It is not a weakly prime, because it can be changed into another prime (42591335077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21295667528 + 21295667529.

It is an arithmetic number, because the mean of its divisors is an integer number (21295667529).

Almost surely, 2^42591335057 is an apocalyptic number.

It is an amenable number.

42591335057 is a deficient number, since it is larger than the sum of its proper divisors (1).

42591335057 is an equidigital number, since it uses as much as digits as its factorization.

42591335057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567000, while the sum is 44.

The spelling of 42591335057 in words is "forty-two billion, five hundred ninety-one million, three hundred thirty-five thousand, fifty-seven".