72543544929 has 12 divisors (see below), whose sum is σ = 105081966756. Its totient is φ = 48225357312.

The previous prime is 72543544897. The next prime is 72543544939. The reversal of 72543544929 is 92944534527.

It is a happy number.

72543544929 is a `hidden beast` number, since 7 + 2 + 5 + 4 + 3 + 544 + 92 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13560136704 + 58983408225 = 116448^2 + 242865^2 .

It is not a de Polignac number, because 72543544929 - 2⁵ = 72543544897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72543544939) 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 11 ways as a sum of consecutive naturals, for example, 11413812 + ... + 11420165.

It is an arithmetic number, because the mean of its divisors is an integer number (8756830563).

Almost surely, 2^72543544929 is an apocalyptic number.

It is an amenable number.

72543544929 is a deficient number, since it is larger than the sum of its proper divisors (32538421827).

72543544929 is a wasteful number, since it uses less digits than its factorization.

72543544929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22834336 (or 22834333 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The spelling of 72543544929 in words is "seventy-two billion, five hundred forty-three million, five hundred forty-four thousand, nine hundred twenty-nine".