72160521549 has 8 divisors (see below), whose sum is σ = 96409985952. Its totient is φ = 48009035760.

The previous prime is 72160521527. The next prime is 72160521551. The reversal of 72160521549 is 94512506127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72160521549 - 2¹² = 72160517453 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72160521549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72160521569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24492934 + ... + 24495879.

It is an arithmetic number, because the mean of its divisors is an integer number (12051248244).

Almost surely, 2^72160521549 is an apocalyptic number.

It is an amenable number.

72160521549 is a deficient number, since it is larger than the sum of its proper divisors (24249464403).

72160521549 is a wasteful number, since it uses less digits than its factorization.

72160521549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48989307.

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 72160521549 in words is "seventy-two billion, one hundred sixty million, five hundred twenty-one thousand, five hundred forty-nine".