729549378549 has 6 divisors (see below), whose sum is σ = 1053793546806. Its totient is φ = 486366252360.

The previous prime is 729549378533. The next prime is 729549378611. The reversal of 729549378549 is 945873945927.

729549378549 is a `hidden beast` number, since 7 + 2 + 9 + 5 + 4 + 9 + 3 + 78 + 549 = 666.

729549378549 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 370607000625 + 358942377924 = 608775^2 + 599118^2 .

It is not a de Polignac number, because 729549378549 - 2⁴ = 729549378533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729549328549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40530521022 + ... + 40530521039.

It is an arithmetic number, because the mean of its divisors is an integer number (175632257801).

Almost surely, 2^729549378549 is an apocalyptic number.

It is an amenable number.

729549378549 is a deficient number, since it is larger than the sum of its proper divisors (324244168257).

729549378549 is a wasteful number, since it uses less digits than its factorization.

729549378549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81061042067 (or 81061042064 counting only the distinct ones).

The product of its digits is 685843200, while the sum is 72.

The spelling of 729549378549 in words is "seven hundred twenty-nine billion, five hundred forty-nine million, three hundred seventy-eight thousand, five hundred forty-nine".