75221018133680 has 20 divisors (see below), whose sum is σ = 174888867160992. Its totient is φ = 30088407253440.

The previous prime is 75221018133649. The next prime is 75221018133689. The reversal of 75221018133680 is 8633181012257.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (75221018133689) 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, 470131363256 + ... + 470131363415.

Almost surely, 2^{75221018133680} is an apocalyptic number.

It is an amenable number.

75221018133680 is an abundant number, since it is smaller than the sum of its proper divisors (99667849027312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75221018133680 is a wasteful number, since it uses less digits than its factorization.

75221018133680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940262726684 (or 940262726678 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 75221018133680 in words is "seventy-five trillion, two hundred twenty-one billion, eighteen million, one hundred thirty-three thousand, six hundred eighty".