72843961547 has 36 divisors (see below), whose sum is σ = 90983440080. Its totient is φ = 57054497472.

The previous prime is 72843961517. The next prime is 72843961571. The reversal of 72843961547 is 74516934827.

It is not a de Polignac number, because 72843961547 - 2¹² = 72843957451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72843961492 and 72843961501.

It is not an unprimeable number, because it can be changed into a prime (72843961507) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 73062653 + ... + 73063649.

It is an arithmetic number, because the mean of its divisors is an integer number (2527317780).

Almost surely, 2^72843961547 is an apocalyptic number.

72843961547 is a deficient number, since it is larger than the sum of its proper divisors (18139478533).

72843961547 is an frugal number, since it uses more digits than its factorization.

72843961547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068 (or 1052 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 56.

The spelling of 72843961547 in words is "seventy-two billion, eight hundred forty-three million, nine hundred sixty-one thousand, five hundred forty-seven".