72204595186 has 4 divisors (see below), whose sum is σ = 108306892782. Its totient is φ = 36102297592.

The previous prime is 72204595171. The next prime is 72204595189. The reversal of 72204595186 is 68159540227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68159540227 = 103 ⋅661743109.

It can be written as a sum of positive squares in only one way, i.e., 62387550625 + 9817044561 = 249775^2 + 99081^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (72204595189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18051148795 + ... + 18051148798.

Almost surely, 2^72204595186 is an apocalyptic number.

72204595186 is a deficient number, since it is larger than the sum of its proper divisors (36102297596).

72204595186 is a wasteful number, since it uses less digits than its factorization.

72204595186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36102297595.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 72204595186 in words is "seventy-two billion, two hundred four million, five hundred ninety-five thousand, one hundred eighty-six".