49439315778 has 24 divisors (see below), whose sum is σ = 102171168144. Its totient is φ = 15948164520.

The previous prime is 49439315713. The next prime is 49439315789. The reversal of 49439315778 is 87751393494.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4281376 + ... + 4292907.

It is an arithmetic number, because the mean of its divisors is an integer number (4257132006).

Almost surely, 2^49439315778 is an apocalyptic number.

49439315778 is an abundant number, since it is smaller than the sum of its proper divisors (52731852366).

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

49439315778 is a wasteful number, since it uses less digits than its factorization.

49439315778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8574350 (or 8574319 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 60.

The spelling of 49439315778 in words is "forty-nine billion, four hundred thirty-nine million, three hundred fifteen thousand, seven hundred seventy-eight".