72836821519585 has 8 divisors (see below), whose sum is σ = 87766858795176. Its totient is φ = 58027675234560.

The previous prime is 72836821519549. The next prime is 72836821519603. The reversal of 72836821519585 is 58591512863827.

It can be written as a sum of positive squares in 4 ways, for example, as 37582772769441 + 35254048750144 = 6130479^2 + 5937512^2 .

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

It is not a de Polignac number, because 72836821519585 - 2¹⁵ = 72836821486817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30222746314 + ... + 30222748723.

It is an arithmetic number, because the mean of its divisors is an integer number (10970857349397).

Almost surely, 2^{72836821519585} is an apocalyptic number.

It is an amenable number.

72836821519585 is a deficient number, since it is larger than the sum of its proper divisors (14930037275591).

72836821519585 is a wasteful number, since it uses less digits than its factorization.

72836821519585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60445495283.

The product of its digits is 290304000, while the sum is 70.

The spelling of 72836821519585 in words is "seventy-two trillion, eight hundred thirty-six billion, eight hundred twenty-one million, five hundred nineteen thousand, five hundred eighty-five".