331340342520646 has 4 divisors (see below), whose sum is σ = 497010513780972. Its totient is φ = 165670171260322.

The previous prime is 331340342520617. The next prime is 331340342520679. The reversal of 331340342520646 is 646025243043133.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 331340342520596 and 331340342520605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82835085630160 + ... + 82835085630163.

It is an arithmetic number, because the mean of its divisors is an integer number (124252628445243).

Almost surely, 2^{331340342520646} is an apocalyptic number.

331340342520646 is a deficient number, since it is larger than the sum of its proper divisors (165670171260326).

331340342520646 is a wasteful number, since it uses less digits than its factorization.

331340342520646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165670171260325.

The product of its (nonzero) digits is 3732480, while the sum is 46.

Adding to 331340342520646 its reverse (646025243043133), we get a palindrome (977365585563779).

The spelling of 331340342520646 in words is "three hundred thirty-one trillion, three hundred forty billion, three hundred forty-two million, five hundred twenty thousand, six hundred forty-six".