49449277818 has 64 divisors (see below), whose sum is σ = 112400939520. Its totient is φ = 16107143616.

The previous prime is 49449277753. The next prime is 49449277831. The reversal of 49449277818 is 81877294494.

49449277818 is a `hidden beast` number, since 49 + 449 + 2 + 77 + 81 + 8 = 666.

It is a super-2 number, since 2×49449277818² (a number of 22 digits) contains 22 as substring.

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, 1642396 + ... + 1672232.

It is an arithmetic number, because the mean of its divisors is an integer number (1756264680).

Almost surely, 2^49449277818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49449277818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56200469760).

49449277818 is an abundant number, since it is smaller than the sum of its proper divisors (62951661702).

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

49449277818 is a wasteful number, since it uses less digits than its factorization.

49449277818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30548 (or 30542 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The spelling of 49449277818 in words is "forty-nine billion, four hundred forty-nine million, two hundred seventy-seven thousand, eight hundred eighteen".