72164172622 has 8 divisors (see below), whose sum is σ = 108667451376. Its totient is φ = 35941688832.

The previous prime is 72164172617. The next prime is 72164172643. The reversal of 72164172622 is 22627146127.

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

It is a congruent number.

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, 70198098 + ... + 70199125.

It is an arithmetic number, because the mean of its divisors is an integer number (13583431422).

Almost surely, 2^72164172622 is an apocalyptic number.

72164172622 is a deficient number, since it is larger than the sum of its proper divisors (36503278754).

72164172622 is a wasteful number, since it uses less digits than its factorization.

72164172622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140397482.

The product of its digits is 112896, while the sum is 40.

The spelling of 72164172622 in words is "seventy-two billion, one hundred sixty-four million, one hundred seventy-two thousand, six hundred twenty-two".