72834869729 has 4 divisors (see below), whose sum is σ = 72835411476. Its totient is φ = 72834327984.

The previous prime is 72834869707. The next prime is 72834869749. The reversal of 72834869729 is 92796843827.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 65597454400 + 7237415329 = 256120^2 + 85073^2 .

It is a cyclic number.

It is not a de Polignac number, because 72834869729 - 2⁸ = 72834869473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72834869749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100667 + ... + 394719.

It is an arithmetic number, because the mean of its divisors is an integer number (18208852869).

Almost surely, 2^72834869729 is an apocalyptic number.

It is an amenable number.

72834869729 is a deficient number, since it is larger than the sum of its proper divisors (541747).

72834869729 is a wasteful number, since it uses less digits than its factorization.

72834869729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541746.

The product of its digits is 73156608, while the sum is 65.

The spelling of 72834869729 in words is "seventy-two billion, eight hundred thirty-four million, eight hundred sixty-nine thousand, seven hundred twenty-nine".