75540681420 has 48 divisors (see below), whose sum is σ = 212695580160. Its totient is φ = 20031641536.

The previous prime is 75540681401. The next prime is 75540681421. The reversal of 75540681420 is 2418604557.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (75540681421) 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 15 ways as a sum of consecutive naturals, for example, 3506052 + ... + 3527531.

It is an arithmetic number, because the mean of its divisors is an integer number (4431157920).

Almost surely, 2^75540681420 is an apocalyptic number.

It is an amenable number.

75540681420 is an abundant number, since it is smaller than the sum of its proper divisors (137154898740).

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

75540681420 is a wasteful number, since it uses less digits than its factorization.

75540681420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7033774 (or 7033772 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 42.

The spelling of 75540681420 in words is "seventy-five billion, five hundred forty million, six hundred eighty-one thousand, four hundred twenty".