642675577338 has 48 divisors (see below), whose sum is σ = 1483920711936. Its totient is φ = 200551237920.

The previous prime is 642675577319. The next prime is 642675577373. The reversal of 642675577338 is 833775576246.

642675577338 is a `hidden beast` number, since 6 + 4 + 2 + 6 + 7 + 557 + 73 + 3 + 8 = 666.

642675577338 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16494973 + ... + 16533888.

It is an arithmetic number, because the mean of its divisors is an integer number (30915014832).

Almost surely, 2^642675577338 is an apocalyptic number.

642675577338 is an abundant number, since it is smaller than the sum of its proper divisors (841245134598).

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

642675577338 is a wasteful number, since it uses less digits than its factorization.

642675577338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33028939 (or 33028936 counting only the distinct ones).

The product of its digits is 177811200, while the sum is 63.

The spelling of 642675577338 in words is "six hundred forty-two billion, six hundred seventy-five million, five hundred seventy-seven thousand, three hundred thirty-eight".