642973718912 has 512 divisors, whose sum is σ = 1628605440000. Its totient is φ = 246781624320.

The previous prime is 642973718911. The next prime is 642973718929. The reversal of 642973718912 is 219817379246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642973718911) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4625710139 + ... + 4625710277.

It is an arithmetic number, because the mean of its divisors is an integer number (3180870000).

Almost surely, 2^642973718912 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 642973718912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (814302720000).

642973718912 is an abundant number, since it is smaller than the sum of its proper divisors (985631721088).

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

642973718912 is a wasteful number, since it uses less digits than its factorization.

642973718912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 370 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 59.

The spelling of 642973718912 in words is "six hundred forty-two billion, nine hundred seventy-three million, seven hundred eighteen thousand, nine hundred twelve".