72858657293 has 4 divisors (see below), whose sum is σ = 72883200060. Its totient is φ = 72834114528.

The previous prime is 72858657271. The next prime is 72858657301. The reversal of 72858657293 is 39275685827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39275685827 = 7 ⋅5610812261.

It can be written as a sum of positive squares in 2 ways, for example, as 4820108329 + 68038548964 = 69427^2 + 260842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72858657293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72858657203) 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 3 ways as a sum of consecutive naturals, for example, 12266930 + ... + 12272867.

It is an arithmetic number, because the mean of its divisors is an integer number (18220800015).

Almost surely, 2^72858657293 is an apocalyptic number.

It is an amenable number.

72858657293 is a deficient number, since it is larger than the sum of its proper divisors (24542767).

72858657293 is a wasteful number, since it uses less digits than its factorization.

72858657293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24542766.

The product of its digits is 50803200, while the sum is 62.

The spelling of 72858657293 in words is "seventy-two billion, eight hundred fifty-eight million, six hundred fifty-seven thousand, two hundred ninety-three".