642471406342060 has 96 divisors (see below), whose sum is σ = 1444667118612480. Its totient is φ = 239143685603328.

The previous prime is 642471406342039. The next prime is 642471406342093. The reversal of 642471406342060 is 60243604174246.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 642471406341995 and 642471406342013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 725101269 + ... + 725986771.

It is an arithmetic number, because the mean of its divisors is an integer number (15048615818880).

Almost surely, 2^{642471406342060} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642471406342060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (722333559306240).

642471406342060 is an abundant number, since it is smaller than the sum of its proper divisors (802195712270420).

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

642471406342060 is a wasteful number, since it uses less digits than its factorization.

642471406342060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909595 (or 909593 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 49.

The spelling of 642471406342060 in words is "six hundred forty-two trillion, four hundred seventy-one billion, four hundred six million, three hundred forty-two thousand, sixty".