218715109642 has 8 divisors (see below), whose sum is σ = 332693406432. Its totient is φ = 107817307500.

The previous prime is 218715109631. The next prime is 218715109681. The reversal of 218715109642 is 246901517812.

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

It is a junction number, because it is equal to n+sod(n) for n = 218715109592 and 218715109601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770123484 + ... + 770123767.

It is an arithmetic number, because the mean of its divisors is an integer number (41586675804).

Almost surely, 2^218715109642 is an apocalyptic number.

218715109642 is a deficient number, since it is larger than the sum of its proper divisors (113978296790).

218715109642 is a wasteful number, since it uses less digits than its factorization.

218715109642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540247324.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 218715109642 in words is "two hundred eighteen billion, seven hundred fifteen million, one hundred nine thousand, six hundred forty-two".