642311604001 has 2 divisors, whose sum is σ = 642311604002. Its totient is φ = 642311604000.

The previous prime is 642311603987. The next prime is 642311604023. The reversal of 642311604001 is 100406113246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640518504976 + 1793099025 = 800324^2 + 42345^2 .

It is a cyclic number.

It is not a de Polignac number, because 642311604001 - 2⁷ = 642311603873 is a prime.

It is not a weakly prime, because it can be changed into another prime (642311604091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321155802000 + 321155802001.

It is an arithmetic number, because the mean of its divisors is an integer number (321155802001).

Almost surely, 2^642311604001 is an apocalyptic number.

It is an amenable number.

642311604001 is a deficient number, since it is larger than the sum of its proper divisors (1).

642311604001 is an equidigital number, since it uses as much as digits as its factorization.

642311604001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 642311604001 its reverse (100406113246), we get a palindrome (742717717247).

The spelling of 642311604001 in words is "six hundred forty-two billion, three hundred eleven million, six hundred four thousand, one".