72018347109 has 16 divisors (see below), whose sum is σ = 101897740800. Its totient is φ = 45146355056.

The previous prime is 72018347087. The next prime is 72018347131. The reversal of 72018347109 is 90174381027.

It is an interprime number because it is at equal distance from previous prime (72018347087) and next prime (72018347131).

It is a cyclic number.

It is not a de Polignac number, because 72018347109 - 2⁵ = 72018347077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72018347179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8841219 + ... + 8849360.

It is an arithmetic number, because the mean of its divisors is an integer number (6368608800).

Almost surely, 2^72018347109 is an apocalyptic number.

It is an amenable number.

72018347109 is a deficient number, since it is larger than the sum of its proper divisors (29879393691).

72018347109 is a wasteful number, since it uses less digits than its factorization.

72018347109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17690664.

The product of its (nonzero) digits is 84672, while the sum is 42.

The spelling of 72018347109 in words is "seventy-two billion, eighteen million, three hundred forty-seven thousand, one hundred nine".