49855640784 has 160 divisors (see below), whose sum is σ = 137747433600. Its totient is φ = 15483764736.

The previous prime is 49855640777. The next prime is 49855640867. The reversal of 49855640784 is 48704655894.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 52645399 + ... + 52646345.

It is an arithmetic number, because the mean of its divisors is an integer number (860921460).

Almost surely, 2^49855640784 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 49855640784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68873716800).

49855640784 is an abundant number, since it is smaller than the sum of its proper divisors (87891792816).

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

49855640784 is a wasteful number, since it uses less digits than its factorization.

49855640784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557 (or 1551 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 60.

The spelling of 49855640784 in words is "forty-nine billion, eight hundred fifty-five million, six hundred forty thousand, seven hundred eighty-four".