72185168122 has 4 divisors (see below), whose sum is σ = 108277752186. Its totient is φ = 36092584060.

The previous prime is 72185168119. The next prime is 72185168129. The reversal of 72185168122 is 22186158127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 69844446961 + 2340721161 = 264281^2 + 48381^2 .

It is not an unprimeable number, because it can be changed into a prime (72185168129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18046292029 + ... + 18046292032.

Almost surely, 2^72185168122 is an apocalyptic number.

72185168122 is a deficient number, since it is larger than the sum of its proper divisors (36092584064).

72185168122 is a wasteful number, since it uses less digits than its factorization.

72185168122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36092584063.

The product of its digits is 107520, while the sum is 43.

The spelling of 72185168122 in words is "seventy-two billion, one hundred eighty-five million, one hundred sixty-eight thousand, one hundred twenty-two".