42041398669 has 2 divisors, whose sum is σ = 42041398670. Its totient is φ = 42041398668.

The previous prime is 42041398639. The next prime is 42041398697. The reversal of 42041398669 is 96689314024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21319796169 + 20721602500 = 146013^2 + 143950^2 .

It is a cyclic number.

It is not a de Polignac number, because 42041398669 - 2⁷ = 42041398541 is a prime.

It is a super-2 number, since 2×42041398669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42041398639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21020699334 + 21020699335.

It is an arithmetic number, because the mean of its divisors is an integer number (21020699335).

Almost surely, 2^42041398669 is an apocalyptic number.

It is an amenable number.

42041398669 is a deficient number, since it is larger than the sum of its proper divisors (1).

42041398669 is an equidigital number, since it uses as much as digits as its factorization.

42041398669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 42041398669 in words is "forty-two billion, forty-one million, three hundred ninety-eight thousand, six hundred sixty-nine".