49144738816 has 66 divisors (see below), whose sum is σ = 99964700498. Its totient is φ = 24142295040.

The previous prime is 49144738793. The next prime is 49144738817. The reversal of 49144738816 is 61883744194.

It can be written as a sum of positive squares in only one way, i.e., 29003452416 + 20141286400 = 170304^2 + 141920^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49144738817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55405125 + ... + 55406011.

Almost surely, 2^49144738816 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 49144738816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49982350249).

49144738816 is an abundant number, since it is smaller than the sum of its proper divisors (50819961682).

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

49144738816 is an frugal number, since it uses more digits than its factorization.

49144738816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855 (or 950 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 55.

The spelling of 49144738816 in words is "forty-nine billion, one hundred forty-four million, seven hundred thirty-eight thousand, eight hundred sixteen".