72471066769 has 2 divisors, whose sum is σ = 72471066770. Its totient is φ = 72471066768.

The previous prime is 72471066737. The next prime is 72471066791. The reversal of 72471066769 is 96766017427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71362176769 + 1108890000 = 267137^2 + 33300^2 .

It is a cyclic number.

It is not a de Polignac number, because 72471066769 - 2⁵ = 72471066737 is a prime.

It is a super-2 number, since 2×72471066769² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72471066169) 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 as a sum of consecutive naturals, namely, 36235533384 + 36235533385.

It is an arithmetic number, because the mean of its divisors is an integer number (36235533385).

Almost surely, 2^72471066769 is an apocalyptic number.

It is an amenable number.

72471066769 is a deficient number, since it is larger than the sum of its proper divisors (1).

72471066769 is an equidigital number, since it uses as much as digits as its factorization.

72471066769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5334336, while the sum is 55.

The spelling of 72471066769 in words is "seventy-two billion, four hundred seventy-one million, sixty-six thousand, seven hundred sixty-nine".