42404399969 has 2 divisors, whose sum is σ = 42404399970. Its totient is φ = 42404399968.

The previous prime is 42404399941. The next prime is 42404400029. The reversal of 42404399969 is 96999340424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36641616400 + 5762783569 = 191420^2 + 75913^2 .

It is a cyclic number.

It is not a de Polignac number, because 42404399969 - 2²⁸ = 42135964513 is a prime.

It is a super-2 number, since 2×42404399969² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42404339969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21202199984 + 21202199985.

It is an arithmetic number, because the mean of its divisors is an integer number (21202199985).

Almost surely, 2^42404399969 is an apocalyptic number.

It is an amenable number.

42404399969 is a deficient number, since it is larger than the sum of its proper divisors (1).

42404399969 is an equidigital number, since it uses as much as digits as its factorization.

42404399969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15116544, while the sum is 59.

The spelling of 42404399969 in words is "forty-two billion, four hundred four million, three hundred ninety-nine thousand, nine hundred sixty-nine".