72181091245 has 16 divisors (see below), whose sum is σ = 90390805632. Its totient is φ = 55229627200.

The previous prime is 72181091209. The next prime is 72181091273. The reversal of 72181091245 is 54219018127.

It is not a de Polignac number, because 72181091245 - 2⁷ = 72181091117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72181091198 and 72181091207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2133834 + ... + 2167396.

It is an arithmetic number, because the mean of its divisors is an integer number (5649425352).

Almost surely, 2^72181091245 is an apocalyptic number.

It is an amenable number.

72181091245 is a deficient number, since it is larger than the sum of its proper divisors (18209714387).

72181091245 is a wasteful number, since it uses less digits than its factorization.

72181091245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52292.

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 72181091245 in words is "seventy-two billion, one hundred eighty-one million, ninety-one thousand, two hundred forty-five".