72160672061721 has 8 divisors (see below), whose sum is σ = 97166845548864. Its totient is φ = 47630806641200.

The previous prime is 72160672061713. The next prime is 72160672061743. The reversal of 72160672061721 is 12716027606127.

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

It is a cyclic number.

It is not a de Polignac number, because 72160672061721 - 2³ = 72160672061713 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72160672061321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119077016301 + ... + 119077016906.

It is an arithmetic number, because the mean of its divisors is an integer number (12145855693608).

Almost surely, 2^{72160672061721} is an apocalyptic number.

It is an amenable number.

72160672061721 is a deficient number, since it is larger than the sum of its proper divisors (25006173487143).

72160672061721 is a wasteful number, since it uses less digits than its factorization.

72160672061721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238154033311.

The product of its (nonzero) digits is 592704, while the sum is 48.

Adding to 72160672061721 its reverse (12716027606127), we get a palindrome (84876699667848).

The spelling of 72160672061721 in words is "seventy-two trillion, one hundred sixty billion, six hundred seventy-two million, sixty-one thousand, seven hundred twenty-one".