75555555444444 has 24 divisors (see below), whose sum is σ = 178711313793040. Its totient is φ = 24840182611584.

The previous prime is 75555555444433. The next prime is 75555555444461. The reversal of 75555555444444 is 44444455555557.

It is a happy number.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43125316159 + ... + 43125317910.

Almost surely, 2^{75555555444444} is an apocalyptic number.

It is an amenable number.

75555555444444 is an abundant number, since it is smaller than the sum of its proper divisors (103155758348596).

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

75555555444444 is a wasteful number, since it uses less digits than its factorization.

75555555444444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86250634149 (or 86250634147 counting only the distinct ones).

The product of its digits is 2240000000, while the sum is 66.

The spelling of 75555555444444 in words is "seventy-five trillion, five hundred fifty-five billion, five hundred fifty-five million, four hundred forty-four thousand, four hundred forty-four".