72717036543 has 24 divisors (see below), whose sum is σ = 106980294720. Its totient is φ = 47587625280.

The previous prime is 72717036541. The next prime is 72717036571. The reversal of 72717036543 is 34563071727.

72717036543 is a `hidden beast` number, since 7 + 2 + 7 + 1 + 70 + 36 + 543 = 666.

It is not a de Polignac number, because 72717036543 - 2¹ = 72717036541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72717036541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172588 + ... + 418593.

It is an arithmetic number, because the mean of its divisors is an integer number (4457512280).

Almost surely, 2^72717036543 is an apocalyptic number.

72717036543 is a deficient number, since it is larger than the sum of its proper divisors (34263258177).

72717036543 is a wasteful number, since it uses less digits than its factorization.

72717036543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591439 (or 591436 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 45.

The spelling of 72717036543 in words is "seventy-two billion, seven hundred seventeen million, thirty-six thousand, five hundred forty-three".