72315770636105 has 4 divisors (see below), whose sum is σ = 86778924763332. Its totient is φ = 57852616508880.

The previous prime is 72315770636089. The next prime is 72315770636141. The reversal of 72315770636105 is 50163607751327.

It is a happy number.

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 47332927691449 + 24982842944656 = 6879893^2 + 4998284^2 .

It is not a de Polignac number, because 72315770636105 - 2⁴ = 72315770636089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7231577063606 + ... + 7231577063615.

It is an arithmetic number, because the mean of its divisors is an integer number (21694731190833).

Almost surely, 2^{72315770636105} is an apocalyptic number.

It is an amenable number.

72315770636105 is a deficient number, since it is larger than the sum of its proper divisors (14463154127227).

72315770636105 is a wasteful number, since it uses less digits than its factorization.

72315770636105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14463154127226.

The product of its (nonzero) digits is 5556600, while the sum is 53.

The spelling of 72315770636105 in words is "seventy-two trillion, three hundred fifteen billion, seven hundred seventy million, six hundred thirty-six thousand, one hundred five".