1855055188550 has 12 divisors (see below), whose sum is σ = 3450402650796. Its totient is φ = 742022075400.

The previous prime is 1855055188507. The next prime is 1855055188589. The reversal of 1855055188550 is 558815505581.

It is a super-2 number, since 2×1855055188550² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18550551836 + ... + 18550551935.

It is an arithmetic number, because the mean of its divisors is an integer number (287533554233).

Almost surely, 2^{1855055188550} is an apocalyptic number.

1855055188550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1855055188550 is a deficient number, since it is larger than the sum of its proper divisors (1595347462246).

1855055188550 is a wasteful number, since it uses less digits than its factorization.

1855055188550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37101103783 (or 37101103778 counting only the distinct ones).

The product of its (nonzero) digits is 8000000, while the sum is 56.

The spelling of 1855055188550 in words is "one trillion, eight hundred fifty-five billion, fifty-five million, one hundred eighty-eight thousand, five hundred fifty".