72513246289 has 4 divisors (see below), whose sum is σ = 79105359600. Its totient is φ = 65921132980.

The previous prime is 72513246271. The next prime is 72513246319. The reversal of 72513246289 is 98264231527.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72513246289 - 2⁵ = 72513246257 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72513246229) 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, 3296056639 + ... + 3296056660.

It is an arithmetic number, because the mean of its divisors is an integer number (19776339900).

Almost surely, 2^72513246289 is an apocalyptic number.

It is an amenable number.

72513246289 is a deficient number, since it is larger than the sum of its proper divisors (6592113311).

72513246289 is a wasteful number, since it uses less digits than its factorization.

72513246289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6592113310.

The product of its digits is 1451520, while the sum is 49.

The spelling of 72513246289 in words is "seventy-two billion, five hundred thirteen million, two hundred forty-six thousand, two hundred eighty-nine".