72129449407 has 2 divisors, whose sum is σ = 72129449408. Its totient is φ = 72129449406.

The previous prime is 72129449401. The next prime is 72129449417. The reversal of 72129449407 is 70494492127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72129449407 - 2¹¹ = 72129447359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72129449401) 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, 36064724703 + 36064724704.

It is an arithmetic number, because the mean of its divisors is an integer number (36064724704).

Almost surely, 2^72129449407 is an apocalyptic number.

72129449407 is a deficient number, since it is larger than the sum of its proper divisors (1).

72129449407 is an equidigital number, since it uses as much as digits as its factorization.

72129449407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 72129449407 in words is "seventy-two billion, one hundred twenty-nine million, four hundred forty-nine thousand, four hundred seven".