72839183869 has 4 divisors (see below), whose sum is σ = 72854591260. Its totient is φ = 72823776480.

The previous prime is 72839183827. The next prime is 72839183881. The reversal of 72839183869 is 96838193827.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37767258244 + 35071925625 = 194338^2 + 187275^2 .

It is a cyclic number.

It is not a de Polignac number, because 72839183869 - 2²¹ = 72837086717 is a prime.

It is a super-2 number, since 2×72839183869² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72839183869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72839183899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7696602 + ... + 7706059.

It is an arithmetic number, because the mean of its divisors is an integer number (18213647815).

Almost surely, 2^72839183869 is an apocalyptic number.

It is an amenable number.

72839183869 is a deficient number, since it is larger than the sum of its proper divisors (15407391).

72839183869 is a wasteful number, since it uses less digits than its factorization.

72839183869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15407390.

The product of its digits is 31352832, while the sum is 64.

The spelling of 72839183869 in words is "seventy-two billion, eight hundred thirty-nine million, one hundred eighty-three thousand, eight hundred sixty-nine".