72085451869 has 8 divisors (see below), whose sum is σ = 76138403040. Its totient is φ = 68058398736.

The previous prime is 72085451807. The next prime is 72085451881. The reversal of 72085451869 is 96815458027.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72085451869 - 2⁷ = 72085451741 is a prime.

It is a super-2 number, since 2×72085451869² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72085451069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6468787 + ... + 6479920.

It is an arithmetic number, because the mean of its divisors is an integer number (9517300380).

Almost surely, 2^72085451869 is an apocalyptic number.

It is an amenable number.

72085451869 is a deficient number, since it is larger than the sum of its proper divisors (4052951171).

72085451869 is a wasteful number, since it uses less digits than its factorization.

72085451869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12949019.

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 72085451869 in words is "seventy-two billion, eighty-five million, four hundred fifty-one thousand, eight hundred sixty-nine".