42254423557 has 2 divisors, whose sum is σ = 42254423558. Its totient is φ = 42254423556.

The previous prime is 42254423521. The next prime is 42254423597. The reversal of 42254423557 is 75532445224.

It is a happy number.

42254423557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33755243076 + 8499180481 = 183726^2 + 92191^2 .

It is a cyclic number.

It is not a de Polignac number, because 42254423557 - 2²³ = 42246034949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42254423597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21127211778 + 21127211779.

It is an arithmetic number, because the mean of its divisors is an integer number (21127211779).

Almost surely, 2^42254423557 is an apocalyptic number.

It is an amenable number.

42254423557 is a deficient number, since it is larger than the sum of its proper divisors (1).

42254423557 is an equidigital number, since it uses as much as digits as its factorization.

42254423557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344000, while the sum is 43.

The spelling of 42254423557 in words is "forty-two billion, two hundred fifty-four million, four hundred twenty-three thousand, five hundred fifty-seven".