1853349949440 has 832 divisors, whose sum is σ = 7420495564800. Its totient is φ = 434759270400.

The previous prime is 1853349949397. The next prime is 1853349949441. The reversal of 1853349949440 is 449499433581.

1853349949440 is a `hidden beast` number, since 1 + 8 + 53 + 3 + 4 + 99 + 494 + 4 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1853349949441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 188554446 + ... + 188564274.

Almost surely, 2^{1853349949440} is an apocalyptic number.

1853349949440 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 1853349949440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3710247782400).

1853349949440 is an abundant number, since it is smaller than the sum of its proper divisors (5567145615360).

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

1853349949440 is a wasteful number, since it uses less digits than its factorization.

1853349949440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9909 (or 9881 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 63.

The spelling of 1853349949440 in words is "one trillion, eight hundred fifty-three billion, three hundred forty-nine million, nine hundred forty-nine thousand, four hundred forty".