49181818194 has 16 divisors (see below), whose sum is σ = 109292929440. Its totient is φ = 16393939380.

The previous prime is 49181818187. The next prime is 49181818207.

49181818194 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 910774411 = 49181818194 / (4 + 9 + 1 + 8 + 1 + 8 + 1 + 8 + 1 + 9 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 49181818194.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455387152 + ... + 455387259.

It is an arithmetic number, because the mean of its divisors is an integer number (6830808090).

Almost surely, 2^49181818194 is an apocalyptic number.

49181818194 is an abundant number, since it is smaller than the sum of its proper divisors (60111111246).

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

49181818194 is a wasteful number, since it uses less digits than its factorization.

49181818194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910774422 (or 910774416 counting only the distinct ones).

The product of its digits is 663552, while the sum is 54.

The spelling of 49181818194 in words is "forty-nine billion, one hundred eighty-one million, eight hundred eighteen thousand, one hundred ninety-four".