72764646727 has 4 divisors (see below), whose sum is σ = 72848963520. Its totient is φ = 72680329936.

The previous prime is 72764646679. The next prime is 72764646749.

72764646727 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 a de Polignac number, because none of the positive numbers 2^k-72764646727 is a prime.

It is a super-2 number, since 2×72764646727² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72764641727) 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, 42157102 + ... + 42158827.

It is an arithmetic number, because the mean of its divisors is an integer number (18212240880).

Almost surely, 2^72764646727 is an apocalyptic number.

72764646727 is a deficient number, since it is larger than the sum of its proper divisors (84316793).

72764646727 is an equidigital number, since it uses as much as digits as its factorization.

72764646727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84316792.

The product of its digits is 33191424, while the sum is 58.

The spelling of 72764646727 in words is "seventy-two billion, seven hundred sixty-four million, six hundred forty-six thousand, seven hundred twenty-seven".