1851681468 has 96 divisors (see below), whose sum is σ = 5344998400. Its totient is φ = 485844480.

The previous prime is 1851681457. The next prime is 1851681473. The reversal of 1851681468 is 8641861581.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213048 + ... + 221568.

Almost surely, 2^1851681468 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1851681468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2672499200).

1851681468 is an abundant number, since it is smaller than the sum of its proper divisors (3493316932).

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

1851681468 is a wasteful number, since it uses less digits than its factorization.

1851681468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8747 (or 8745 counting only the distinct ones).

The product of its digits is 368640, while the sum is 48.

The square root of 1851681468 is about 43031.1685641931. The cubic root of 1851681468 is about 1227.9728364231.

The spelling of 1851681468 in words is "one billion, eight hundred fifty-one million, six hundred eighty-one thousand, four hundred sixty-eight".