72578728069227 has 14 divisors (see below), whose sum is σ = 108818312456052. Its totient is φ = 48385818712332.

The previous prime is 72578728069213. The next prime is 72578728069231. The reversal of 72578728069227 is 72296082787527.

72578728069227 is a `hidden beast` number, since 7 + 2 + 578 + 7 + 28 + 0 + 6 + 9 + 2 + 27 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-72578728069227 is a prime.

It is a super-2 number, since 2×72578728069227² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72578728269227) 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 13 ways as a sum of consecutive naturals, for example, 49779648153 + ... + 49779649610.

Almost surely, 2^{72578728069227} is an apocalyptic number.

72578728069227 is a deficient number, since it is larger than the sum of its proper divisors (36239584386825).

72578728069227 is an frugal number, since it uses more digits than its factorization.

72578728069227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99559297781 (or 99559297766 counting only the distinct ones).

The product of its (nonzero) digits is 663828480, while the sum is 72.

The spelling of 72578728069227 in words is "seventy-two trillion, five hundred seventy-eight billion, seven hundred twenty-eight million, sixty-nine thousand, two hundred twenty-seven".