72285786523 has 4 divisors (see below), whose sum is σ = 72359775000. Its totient is φ = 72211798048.

The previous prime is 72285786511. The next prime is 72285786527. The reversal of 72285786523 is 32568758227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32568758227 = 4789 ⋅6800743.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72285786523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72285786527) 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, 36992773 + ... + 36994726.

It is an arithmetic number, because the mean of its divisors is an integer number (18089943750).

Almost surely, 2^72285786523 is an apocalyptic number.

72285786523 is a deficient number, since it is larger than the sum of its proper divisors (73988477).

72285786523 is an equidigital number, since it uses as much as digits as its factorization.

72285786523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73988476.

The product of its digits is 11289600, while the sum is 55.

The spelling of 72285786523 in words is "seventy-two billion, two hundred eighty-five million, seven hundred eighty-six thousand, five hundred twenty-three".