72333370621 has 4 divisors (see below), whose sum is σ = 73519163644. Its totient is φ = 71147577600.

The previous prime is 72333370561. The next prime is 72333370639. The reversal of 72333370621 is 12607333327.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40937428900 + 31395941721 = 202330^2 + 177189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72333370621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72333370691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592896420 + ... + 592896541.

It is an arithmetic number, because the mean of its divisors is an integer number (18379790911).

Almost surely, 2^72333370621 is an apocalyptic number.

It is an amenable number.

72333370621 is a deficient number, since it is larger than the sum of its proper divisors (1185793023).

72333370621 is a wasteful number, since it uses less digits than its factorization.

72333370621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185793022.

The product of its (nonzero) digits is 95256, while the sum is 37.

The spelling of 72333370621 in words is "seventy-two billion, three hundred thirty-three million, three hundred seventy thousand, six hundred twenty-one".