642356442146453 has 2 divisors, whose sum is σ = 642356442146454. Its totient is φ = 642356442146452.

The previous prime is 642356442146431. The next prime is 642356442146543. The reversal of 642356442146453 is 354641244653246.

Together with next prime (642356442146543) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344229876085489 + 298126566060964 = 18553433^2 + 17266342^2 .

It is a cyclic number.

It is not a de Polignac number, because 642356442146453 - 2²⁴ = 642356425369237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642356442146392 and 642356442146401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642356442146753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321178221073226 + 321178221073227.

It is an arithmetic number, because the mean of its divisors is an integer number (321178221073227).

Almost surely, 2^{642356442146453} is an apocalyptic number.

It is an amenable number.

642356442146453 is a deficient number, since it is larger than the sum of its proper divisors (1).

642356442146453 is an equidigital number, since it uses as much as digits as its factorization.

642356442146453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 199065600, while the sum is 59.

Adding to 642356442146453 its reverse (354641244653246), we get a palindrome (996997686799699).

The spelling of 642356442146453 in words is "six hundred forty-two trillion, three hundred fifty-six billion, four hundred forty-two million, one hundred forty-six thousand, four hundred fifty-three".