40320420234089 has 2 divisors, whose sum is σ = 40320420234090. Its totient is φ = 40320420234088.

The previous prime is 40320420234023. The next prime is 40320420234103. The reversal of 40320420234089 is 98043202402304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25974567075625 + 14345853158464 = 5096525^2 + 3787592^2 .

It is a cyclic number.

It is not a de Polignac number, because 40320420234089 - 2¹² = 40320420229993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40320420234389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20160210117044 + 20160210117045.

It is an arithmetic number, because the mean of its divisors is an integer number (20160210117045).

Almost surely, 2^{40320420234089} is an apocalyptic number.

It is an amenable number.

40320420234089 is a deficient number, since it is larger than the sum of its proper divisors (1).

40320420234089 is an equidigital number, since it uses as much as digits as its factorization.

40320420234089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331776, while the sum is 41.

The spelling of 40320420234089 in words is "forty trillion, three hundred twenty billion, four hundred twenty million, two hundred thirty-four thousand, eighty-nine".