75220701204520 has 64 divisors (see below), whose sum is σ = 173225792954880. Its totient is φ = 29383666100736.

The previous prime is 75220701204511. The next prime is 75220701204527. The reversal of 75220701204520 is 2540210702257.

It is a self number, because there is not a number n which added to its sum of digits gives 75220701204520.

It is not an unprimeable number, because it can be changed into a prime (75220701204527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42916564 + ... + 44634883.

It is an arithmetic number, because the mean of its divisors is an integer number (2706653014920).

Almost surely, 2^{75220701204520} is an apocalyptic number.

It is an amenable number.

75220701204520 is an abundant number, since it is smaller than the sum of its proper divisors (98005091750360).

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

75220701204520 is a wasteful number, since it uses less digits than its factorization.

75220701204520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87551962 (or 87551958 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 37.

Adding to 75220701204520 its reverse (2540210702257), we get a palindrome (77760911906777).

The spelling of 75220701204520 in words is "seventy-five trillion, two hundred twenty billion, seven hundred one million, two hundred four thousand, five hundred twenty".