72857636333 has 4 divisors (see below), whose sum is σ = 72967860348. Its totient is φ = 72747412320.

The previous prime is 72857636317. The next prime is 72857636339. The reversal of 72857636333 is 33363675827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33363675827 = 164443 ⋅202889.

It can be written as a sum of positive squares in 2 ways, for example, as 53336516809 + 19521119524 = 230947^2 + 139718^2 .

It is a cyclic number.

It is not a de Polignac number, because 72857636333 - 2⁴ = 72857636317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72857636339) 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, 55111016 + ... + 55112337.

It is an arithmetic number, because the mean of its divisors is an integer number (18241965087).

Almost surely, 2^72857636333 is an apocalyptic number.

It is an amenable number.

72857636333 is a deficient number, since it is larger than the sum of its proper divisors (110224015).

72857636333 is a wasteful number, since it uses less digits than its factorization.

72857636333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110224014.

The product of its digits is 11430720, while the sum is 53.

The spelling of 72857636333 in words is "seventy-two billion, eight hundred fifty-seven million, six hundred thirty-six thousand, three hundred thirty-three".