72725717543 has 2 divisors, whose sum is σ = 72725717544. Its totient is φ = 72725717542.

The previous prime is 72725717531. The next prime is 72725717569. The reversal of 72725717543 is 34571752727.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72725717543 - 2¹² = 72725713447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72725717491 and 72725717500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72725717503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36362858771 + 36362858772.

It is an arithmetic number, because the mean of its divisors is an integer number (36362858772).

Almost surely, 2^72725717543 is an apocalyptic number.

72725717543 is a deficient number, since it is larger than the sum of its proper divisors (1).

72725717543 is an equidigital number, since it uses as much as digits as its factorization.

72725717543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2881200, while the sum is 50.

The spelling of 72725717543 in words is "seventy-two billion, seven hundred twenty-five million, seven hundred seventeen thousand, five hundred forty-three".