72269585449 has 2 divisors, whose sum is σ = 72269585450. Its totient is φ = 72269585448.

The previous prime is 72269585431. The next prime is 72269585471. The reversal of 72269585449 is 94458596227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60046071849 + 12223513600 = 245043^2 + 110560^2 .

It is a cyclic number.

It is not a de Polignac number, because 72269585449 - 2⁵ = 72269585417 is a prime.

It is a super-4 number, since 4×72269585449⁴ (a number of 45 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (72269585149) 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 as a sum of consecutive naturals, namely, 36134792724 + 36134792725.

It is an arithmetic number, because the mean of its divisors is an integer number (36134792725).

Almost surely, 2^72269585449 is an apocalyptic number.

It is an amenable number.

72269585449 is a deficient number, since it is larger than the sum of its proper divisors (1).

72269585449 is an equidigital number, since it uses as much as digits as its factorization.

72269585449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43545600, while the sum is 61.

The spelling of 72269585449 in words is "seventy-two billion, two hundred sixty-nine million, five hundred eighty-five thousand, four hundred forty-nine".