75331101621 has 8 divisors (see below), whose sum is σ = 101330331840. Its totient is φ = 49776302912.

The previous prime is 75331101619. The next prime is 75331101631. The reversal of 75331101621 is 12610113357.

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 75331101621 - 2¹ = 75331101619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75331101611) 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, 111107481 + ... + 111108158.

It is an arithmetic number, because the mean of its divisors is an integer number (12666291480).

Almost surely, 2^75331101621 is an apocalyptic number.

It is an amenable number.

75331101621 is a deficient number, since it is larger than the sum of its proper divisors (25999230219).

75331101621 is a wasteful number, since it uses less digits than its factorization.

75331101621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222215755.

The product of its (nonzero) digits is 3780, while the sum is 30.

Adding to 75331101621 its reverse (12610113357), we get a palindrome (87941214978).

The spelling of 75331101621 in words is "seventy-five billion, three hundred thirty-one million, one hundred one thousand, six hundred twenty-one".