402542053393 has 2 divisors, whose sum is σ = 402542053394. Its totient is φ = 402542053392.

The previous prime is 402542053387. The next prime is 402542053519. The reversal of 402542053393 is 393350245204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250607368449 + 151934684944 = 500607^2 + 389788^2 .

It is a cyclic number.

It is not a de Polignac number, because 402542053393 - 2³³ = 393952118801 is a prime.

It is not a weakly prime, because it can be changed into another prime (402542056393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201271026696 + 201271026697.

It is an arithmetic number, because the mean of its divisors is an integer number (201271026697).

Almost surely, 2^402542053393 is an apocalyptic number.

It is an amenable number.

402542053393 is a deficient number, since it is larger than the sum of its proper divisors (1).

402542053393 is an equidigital number, since it uses as much as digits as its factorization.

402542053393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 40.

Adding to 402542053393 its reverse (393350245204), we get a palindrome (795892298597).

The spelling of 402542053393 in words is "four hundred two billion, five hundred forty-two million, fifty-three thousand, three hundred ninety-three".