75657144221 has 8 divisors (see below), whose sum is σ = 79666036320. Its totient is φ = 71650945872.

The previous prime is 75657144193. The next prime is 75657144239. The reversal of 75657144221 is 12244175657.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75657144221 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65657144221) 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, 615650 + ... + 728243.

It is an arithmetic number, because the mean of its divisors is an integer number (9958254540).

Almost surely, 2^75657144221 is an apocalyptic number.

It is an amenable number.

75657144221 is a deficient number, since it is larger than the sum of its proper divisors (4008892099).

75657144221 is a wasteful number, since it uses less digits than its factorization.

75657144221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346875.

The product of its digits is 470400, while the sum is 44.

The spelling of 75657144221 in words is "seventy-five billion, six hundred fifty-seven million, one hundred forty-four thousand, two hundred twenty-one".