72736199216705 has 4 divisors (see below), whose sum is σ = 87283439060052. Its totient is φ = 58188959373360.

The previous prime is 72736199216683. The next prime is 72736199216719. The reversal of 72736199216705 is 50761299163727.

It is a Cunningham number, because it is equal to 8528552²+1.

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 26185039905424 + 46551159311281 = 5117132^2 + 6822841^2 .

It is not a de Polignac number, because 72736199216705 - 2²⁴ = 72736182439489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7273619921666 + ... + 7273619921675.

It is an arithmetic number, because the mean of its divisors is an integer number (21820859765013).

Almost surely, 2^{72736199216705} is an apocalyptic number.

It is an amenable number.

72736199216705 is a deficient number, since it is larger than the sum of its proper divisors (14547239843347).

72736199216705 is a wasteful number, since it uses less digits than its factorization.

72736199216705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14547239843346.

The product of its (nonzero) digits is 60011280, while the sum is 65.

The spelling of 72736199216705 in words is "seventy-two trillion, seven hundred thirty-six billion, one hundred ninety-nine million, two hundred sixteen thousand, seven hundred five".