65555555444444 has 24 divisors (see below), whose sum is σ = 127807250007360. Its totient is φ = 29213085714624.

The previous prime is 65555555444383. The next prime is 65555555444501. The reversal of 65555555444444 is 44444455555556.

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, 21735925364 + ... + 21735928379.

It is an arithmetic number, because the mean of its divisors is an integer number (5325302083640).

Almost surely, 2^{65555555444444} is an apocalyptic number.

It is an amenable number.

65555555444444 is a deficient number, since it is larger than the sum of its proper divisors (62251694562916).

65555555444444 is a wasteful number, since it uses less digits than its factorization.

65555555444444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43471853789 (or 43471853787 counting only the distinct ones).

The product of its digits is 1920000000, while the sum is 65.

The spelling of 65555555444444 in words is "sixty-five trillion, five hundred fifty-five billion, five hundred fifty-five million, four hundred forty-four thousand, four hundred forty-four".