42464543897 has 2 divisors, whose sum is σ = 42464543898. Its totient is φ = 42464543896.

The previous prime is 42464543861. The next prime is 42464543941. The reversal of 42464543897 is 79834546424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24627338761 + 17837205136 = 156931^2 + 133556^2 .

It is a cyclic number.

It is not a de Polignac number, because 42464543897 - 2¹⁰ = 42464542873 is a prime.

It is not a weakly prime, because it can be changed into another prime (42464543827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21232271948 + 21232271949.

It is an arithmetic number, because the mean of its divisors is an integer number (21232271949).

Almost surely, 2^42464543897 is an apocalyptic number.

It is an amenable number.

42464543897 is a deficient number, since it is larger than the sum of its proper divisors (1).

42464543897 is an equidigital number, since it uses as much as digits as its factorization.

42464543897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23224320, while the sum is 56.

The spelling of 42464543897 in words is "forty-two billion, four hundred sixty-four million, five hundred forty-three thousand, eight hundred ninety-seven".