172218701642 has 8 divisors (see below), whose sum is σ = 278199441156. Its totient is φ = 79485554592.

The previous prime is 172218701639. The next prime is 172218701657. The reversal of 172218701642 is 246107812271.

It can be written as a sum of positive squares in 2 ways, for example, as 163263675481 + 8955026161 = 404059^2 + 94631^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 172218701642.

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, 3311898083 + ... + 3311898134.

Almost surely, 2^172218701642 is an apocalyptic number.

172218701642 is a deficient number, since it is larger than the sum of its proper divisors (105980739514).

172218701642 is a wasteful number, since it uses less digits than its factorization.

172218701642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6623796232.

The product of its (nonzero) digits is 75264, while the sum is 41.

The spelling of 172218701642 in words is "one hundred seventy-two billion, two hundred eighteen million, seven hundred one thousand, six hundred forty-two".