642441412583 has 2 divisors, whose sum is σ = 642441412584. Its totient is φ = 642441412582.

The previous prime is 642441412579. The next prime is 642441412631. The reversal of 642441412583 is 385214144246.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 642441412583 - 2² = 642441412579 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642441412573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321220706291 + 321220706292.

It is an arithmetic number, because the mean of its divisors is an integer number (321220706292).

Almost surely, 2^642441412583 is an apocalyptic number.

642441412583 is a deficient number, since it is larger than the sum of its proper divisors (1).

642441412583 is an equidigital number, since it uses as much as digits as its factorization.

642441412583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 737280, while the sum is 44.

The spelling of 642441412583 in words is "six hundred forty-two billion, four hundred forty-one million, four hundred twelve thousand, five hundred eighty-three".