331863320641 has 2 divisors, whose sum is σ = 331863320642. Its totient is φ = 331863320640.

The previous prime is 331863320609. The next prime is 331863320731. The reversal of 331863320641 is 146023368133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 322543349041 + 9319971600 = 567929^2 + 96540^2 .

It is a cyclic number.

It is not a de Polignac number, because 331863320641 - 2⁵ = 331863320609 is a prime.

It is a super-2 number, since 2×331863320641² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331863320594 and 331863320603.

It is not a weakly prime, because it can be changed into another prime (331863320441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165931660320 + 165931660321.

It is an arithmetic number, because the mean of its divisors is an integer number (165931660321).

Almost surely, 2^331863320641 is an apocalyptic number.

It is an amenable number.

331863320641 is a deficient number, since it is larger than the sum of its proper divisors (1).

331863320641 is an equidigital number, since it uses as much as digits as its factorization.

331863320641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 40.

Adding to 331863320641 its reverse (146023368133), we get a palindrome (477886688774).

The spelling of 331863320641 in words is "three hundred thirty-one billion, eight hundred sixty-three million, three hundred twenty thousand, six hundred forty-one".