1855555055672 has 16 divisors (see below), whose sum is σ = 3479760648000. Its totient is φ = 927618882880.

The previous prime is 1855555055663. The next prime is 1855555055693. The reversal of 1855555055672 is 2765505555581.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 19780904 + ... + 19874487.

It is an arithmetic number, because the mean of its divisors is an integer number (217485040500).

Almost surely, 2^{1855555055672} is an apocalyptic number.

It is an amenable number.

1855555055672 is a deficient number, since it is larger than the sum of its proper divisors (1624205592328).

1855555055672 is a wasteful number, since it uses less digits than its factorization.

1855555055672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39661246 (or 39661242 counting only the distinct ones).

The product of its (nonzero) digits is 52500000, while the sum is 59.

The spelling of 1855555055672 in words is "one trillion, eight hundred fifty-five billion, five hundred fifty-five million, fifty-five thousand, six hundred seventy-two".