642123575885 has 8 divisors (see below), whose sum is σ = 840598135776. Its totient is φ = 466998964240.

The previous prime is 642123575879. The next prime is 642123575903. The reversal of 642123575885 is 588575321246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642123575885 - 2¹⁴ = 642123559501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 642123575885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5837486999 + ... + 5837487108.

It is an arithmetic number, because the mean of its divisors is an integer number (105074766972).

Almost surely, 2^642123575885 is an apocalyptic number.

It is an amenable number.

642123575885 is a deficient number, since it is larger than the sum of its proper divisors (198474559891).

642123575885 is a wasteful number, since it uses less digits than its factorization.

642123575885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11674974123.

The product of its digits is 16128000, while the sum is 56.

The spelling of 642123575885 in words is "six hundred forty-two billion, one hundred twenty-three million, five hundred seventy-five thousand, eight hundred eighty-five".