72239328287 has 4 divisors (see below), whose sum is σ = 82559232336. Its totient is φ = 61919424240.

The previous prime is 72239328253. The next prime is 72239328313. The reversal of 72239328287 is 78282393227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72239328287 - 2¹⁶ = 72239262751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72239328587) 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, 5159952014 + ... + 5159952027.

It is an arithmetic number, because the mean of its divisors is an integer number (20639808084).

Almost surely, 2^72239328287 is an apocalyptic number.

72239328287 is a deficient number, since it is larger than the sum of its proper divisors (10319904049).

72239328287 is a wasteful number, since it uses less digits than its factorization.

72239328287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10319904048.

The product of its digits is 4064256, while the sum is 53.

The spelling of 72239328287 in words is "seventy-two billion, two hundred thirty-nine million, three hundred twenty-eight thousand, two hundred eighty-seven".