1851648736 has 96 divisors (see below), whose sum is σ = 4236115968. Its totient is φ = 780380160.

The previous prime is 1851648731. The next prime is 1851648749. The reversal of 1851648736 is 6378461581.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1851648736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1851648731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4834401 + ... + 4834783.

It is an arithmetic number, because the mean of its divisors is an integer number (44126208).

Almost surely, 2^1851648736 is an apocalyptic number.

1851648736 is a gapful number since it is divisible by the number (16) 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 1851648736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2118057984).

1851648736 is an abundant number, since it is smaller than the sum of its proper divisors (2384467232).

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

1851648736 is a wasteful number, since it uses less digits than its factorization.

1851648736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704 (or 696 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 1851648736 is about 43030.7882335427. The cubic root of 1851648736 is about 1227.9656007935.

The spelling of 1851648736 in words is "one billion, eight hundred fifty-one million, six hundred forty-eight thousand, seven hundred thirty-six".