50721949328 has 20 divisors (see below), whose sum is σ = 98772634620. Its totient is φ = 25232237184.

The previous prime is 50721949321. The next prime is 50721949361. The reversal of 50721949328 is 82394912705.

It can be written as a sum of positive squares in 2 ways, for example, as 25565451664 + 25156497664 = 159892^2 + 158608^2 .

It is a super-2 number, since 2×50721949328² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (50721949321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8042843 + ... + 8049146.

It is an arithmetic number, because the mean of its divisors is an integer number (4938631731).

Almost surely, 2^50721949328 is an apocalyptic number.

It is an amenable number.

50721949328 is a deficient number, since it is larger than the sum of its proper divisors (48050685292).

50721949328 is a wasteful number, since it uses less digits than its factorization.

50721949328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16092194 (or 16092188 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 50721949328 in words is "fifty billion, seven hundred twenty-one million, nine hundred forty-nine thousand, three hundred twenty-eight".