72765256727 has 4 divisors (see below), whose sum is σ = 72771654960. Its totient is φ = 72758858496.

The previous prime is 72765256717. The next prime is 72765256793.

72765256727 is nontrivially palindromic in base 10.

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 72765256727 - 2¹² = 72765252631 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72765256717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3182027 + ... + 3204812.

It is an arithmetic number, because the mean of its divisors is an integer number (18192913740).

Almost surely, 2^72765256727 is an apocalyptic number.

72765256727 is a deficient number, since it is larger than the sum of its proper divisors (6398233).

72765256727 is a wasteful number, since it uses less digits than its factorization.

72765256727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6398232.

The product of its digits is 17287200, while the sum is 56.

The spelling of 72765256727 in words is "seventy-two billion, seven hundred sixty-five million, two hundred fifty-six thousand, seven hundred twenty-seven".