1855469149380 has 864 divisors, whose sum is σ = 7462295393280. Its totient is φ = 364280716800.

The previous prime is 1855469149363. The next prime is 1855469149421. The reversal of 1855469149380 is 839419645581.

1855469149380 is a `hidden beast` number, since 1 + 8 + 5 + 5 + 4 + 69 + 1 + 493 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1584516195 + ... + 1584517365.

Almost surely, 2^{1855469149380} is an apocalyptic number.

1855469149380 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 1855469149380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3731147696640).

1855469149380 is an abundant number, since it is smaller than the sum of its proper divisors (5606826243900).

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

1855469149380 is a wasteful number, since it uses less digits than its factorization.

1855469149380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781 (or 1765 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 63.

The spelling of 1855469149380 in words is "one trillion, eight hundred fifty-five billion, four hundred sixty-nine million, one hundred forty-nine thousand, three hundred eighty".