72647149427 has 16 divisors (see below), whose sum is σ = 79014454272. Its totient is φ = 66513208320.

The previous prime is 72647149417. The next prime is 72647149511. The reversal of 72647149427 is 72494174627.

It is a cyclic number.

It is not a de Polignac number, because 72647149427 - 2⁴ = 72647149411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72647149417) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5504078 + ... + 5517260.

It is an arithmetic number, because the mean of its divisors is an integer number (4938403392).

Almost surely, 2^72647149427 is an apocalyptic number.

72647149427 is a deficient number, since it is larger than the sum of its proper divisors (6367304845).

72647149427 is a wasteful number, since it uses less digits than its factorization.

72647149427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21998.

The product of its digits is 4741632, while the sum is 53.

The spelling of 72647149427 in words is "seventy-two billion, six hundred forty-seven million, one hundred forty-nine thousand, four hundred twenty-seven".