72036518399 has 4 divisors (see below), whose sum is σ = 72056405136. Its totient is φ = 72016631664.

The previous prime is 72036518353. The next prime is 72036518417. The reversal of 72036518399 is 99381563027.

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

It is a cyclic number.

It is not a de Polignac number, because 72036518399 - 2¹⁶ = 72036452863 is a prime.

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 72036518399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72036518329) 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, 9937934 + ... + 9945179.

It is an arithmetic number, because the mean of its divisors is an integer number (18014101284).

Almost surely, 2^72036518399 is an apocalyptic number.

72036518399 is a deficient number, since it is larger than the sum of its proper divisors (19886737).

72036518399 is a wasteful number, since it uses less digits than its factorization.

72036518399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19886736.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 72036518399 in words is "seventy-two billion, thirty-six million, five hundred eighteen thousand, three hundred ninety-nine".