49447282781 has 16 divisors (see below), whose sum is σ = 56505222144. Its totient is φ = 42865853184.

The previous prime is 49447282763. The next prime is 49447282789. The reversal of 49447282781 is 18728274494.

It is a cyclic number.

It is not a de Polignac number, because 49447282781 - 2¹⁰ = 49447281757 is a prime.

It is a super-2 number, since 2×49447282781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49447282789) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 139301 + ... + 343946.

It is an arithmetic number, because the mean of its divisors is an integer number (3531576384).

Almost surely, 2^49447282781 is an apocalyptic number.

It is an amenable number.

49447282781 is a deficient number, since it is larger than the sum of its proper divisors (7057939363).

49447282781 is a wasteful number, since it uses less digits than its factorization.

49447282781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483740.

The product of its digits is 7225344, while the sum is 56.

The spelling of 49447282781 in words is "forty-nine billion, four hundred forty-seven million, two hundred eighty-two thousand, seven hundred eighty-one".