65312216442 has 48 divisors (see below), whose sum is σ = 156234300768. Its totient is φ = 19553123040.

The previous prime is 65312216441. The next prime is 65312216447. The reversal of 65312216442 is 24461221356.

65312216442 is a `hidden beast` number, since 6 + 5 + 3 + 1 + 2 + 2 + 1 + 644 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 65312216397 and 65312216406.

It is not an unprimeable number, because it can be changed into a prime (65312216441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1970673 + ... + 2003540.

It is an arithmetic number, because the mean of its divisors is an integer number (3254881266).

Almost surely, 2^65312216442 is an apocalyptic number.

65312216442 is an abundant number, since it is smaller than the sum of its proper divisors (90922084326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65312216442 is a wasteful number, since it uses less digits than its factorization.

65312216442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974315 (or 3974312 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

Adding to 65312216442 its reverse (24461221356), we get a palindrome (89773437798).

The spelling of 65312216442 in words is "sixty-five billion, three hundred twelve million, two hundred sixteen thousand, four hundred forty-two".