642324245539 has 2 divisors, whose sum is σ = 642324245540. Its totient is φ = 642324245538.

The previous prime is 642324245531. The next prime is 642324245557. The reversal of 642324245539 is 935542423246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 642324245539 - 2³ = 642324245531 is a prime.

It is a super-2 number, since 2×642324245539² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 642324245492 and 642324245501.

It is not a weakly prime, because it can be changed into another prime (642324245531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321162122769 + 321162122770.

It is an arithmetic number, because the mean of its divisors is an integer number (321162122770).

Almost surely, 2^642324245539 is an apocalyptic number.

642324245539 is a deficient number, since it is larger than the sum of its proper divisors (1).

642324245539 is an equidigital number, since it uses as much as digits as its factorization.

642324245539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6220800, while the sum is 49.

The spelling of 642324245539 in words is "six hundred forty-two billion, three hundred twenty-four million, two hundred forty-five thousand, five hundred thirty-nine".