642453646116 has 96 divisors (see below), whose sum is σ = 1644472368000. Its totient is φ = 194307463168.

The previous prime is 642453646069. The next prime is 642453646123. The reversal of 642453646116 is 611646354246.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3816250 + ... + 3981038.

It is an arithmetic number, because the mean of its divisors is an integer number (17129920500).

Almost surely, 2^642453646116 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 642453646116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (822236184000).

642453646116 is an abundant number, since it is smaller than the sum of its proper divisors (1002018721884).

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

642453646116 is a wasteful number, since it uses less digits than its factorization.

642453646116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165501 (or 165499 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 48.

The spelling of 642453646116 in words is "six hundred forty-two billion, four hundred fifty-three million, six hundred forty-six thousand, one hundred sixteen".