1855090991040 has 224 divisors, whose sum is σ = 6737058676224. Its totient is φ = 423659950080.

The previous prime is 1855090991023. The next prime is 1855090991051. The reversal of 1855090991040 is 401990905581.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7819447 + ... + 8053193.

Almost surely, 2^{1855090991040} is an apocalyptic number.

1855090991040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1855090991040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3368529338112).

1855090991040 is an abundant number, since it is smaller than the sum of its proper divisors (4881967685184).

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

1855090991040 is a wasteful number, since it uses less digits than its factorization.

1855090991040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234955 (or 234945 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 51.

The spelling of 1855090991040 in words is "one trillion, eight hundred fifty-five billion, ninety million, nine hundred ninety-one thousand, forty".