1855557513356 has 12 divisors (see below), whose sum is σ = 3247243071240. Its totient is φ = 927773778720.

The previous prime is 1855557513347. The next prime is 1855557513379. The reversal of 1855557513356 is 6533157555581.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1855557513295 and 1855557513304.

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, 331346 + ... + 1954713.

It is an arithmetic number, because the mean of its divisors is an integer number (270603589270).

Almost surely, 2^{1855557513356} is an apocalyptic number.

It is an amenable number.

1855557513356 is a deficient number, since it is larger than the sum of its proper divisors (1391685557884).

1855557513356 is a wasteful number, since it uses less digits than its factorization.

1855557513356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488984 (or 2488982 counting only the distinct ones).

The product of its digits is 47250000, while the sum is 59.

The spelling of 1855557513356 in words is "one trillion, eight hundred fifty-five billion, five hundred fifty-seven million, five hundred thirteen thousand, three hundred fifty-six".