72323760871721 has 8 divisors (see below), whose sum is σ = 72504507033504. Its totient is φ = 72143125297600.

The previous prime is 72323760871717. The next prime is 72323760871799. The reversal of 72323760871721 is 12717806732327.

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 72323760871721 - 2² = 72323760871717 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72323760871711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26337215 + ... + 28953348.

It is an arithmetic number, because the mean of its divisors is an integer number (9063063379188).

Almost surely, 2^{72323760871721} is an apocalyptic number.

It is an amenable number.

72323760871721 is a deficient number, since it is larger than the sum of its proper divisors (180746161783).

72323760871721 is a wasteful number, since it uses less digits than its factorization.

72323760871721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55293831.

The product of its (nonzero) digits is 8297856, while the sum is 56.

The spelling of 72323760871721 in words is "seventy-two trillion, three hundred twenty-three billion, seven hundred sixty million, eight hundred seventy-one thousand, seven hundred twenty-one".