49781717188 has 18 divisors (see below), whose sum is σ = 101341353246. Its totient is φ = 21335021568.

The previous prime is 49781717177. The next prime is 49781717207. The reversal of 49781717188 is 88171718794.

49781717188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 44707719364 + 5073997824 = 211442^2 + 71232^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126993981 + ... + 126994372.

Almost surely, 2^49781717188 is an apocalyptic number.

It is an amenable number.

49781717188 is an abundant number, since it is smaller than the sum of its proper divisors (51559636058).

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

49781717188 is a wasteful number, since it uses less digits than its factorization.

49781717188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253988371 (or 253988362 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 61.

The spelling of 49781717188 in words is "forty-nine billion, seven hundred eighty-one million, seven hundred seventeen thousand, one hundred eighty-eight".