49821163728 has 160 divisors (see below), whose sum is σ = 155485286400. Its totient is φ = 13428592128.

The previous prime is 49821163681. The next prime is 49821163751. The reversal of 49821163728 is 82736112894.

It is a happy number.

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, 1509450 + ... + 1542102.

It is an arithmetic number, because the mean of its divisors is an integer number (971783040).

Almost surely, 2^49821163728 is an apocalyptic number.

49821163728 is a gapful number since it is divisible by the number (48) 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 49821163728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77742643200).

49821163728 is an abundant number, since it is smaller than the sum of its proper divisors (105664122672).

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

49821163728 is a wasteful number, since it uses less digits than its factorization.

49821163728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32929 (or 32923 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The spelling of 49821163728 in words is "forty-nine billion, eight hundred twenty-one million, one hundred sixty-three thousand, seven hundred twenty-eight".