49943381809 has 4 divisors (see below), whose sum is σ = 52114833216. Its totient is φ = 47771930404.

The previous prime is 49943381801. The next prime is 49943381833. The reversal of 49943381809 is 90818334994.

49943381809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 49943381809 - 2³ = 49943381801 is a prime.

It is a super-2 number, since 2×49943381809² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49943381801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1085725669 + ... + 1085725714.

It is an arithmetic number, because the mean of its divisors is an integer number (13028708304).

Almost surely, 2^49943381809 is an apocalyptic number.

It is an amenable number.

49943381809 is a deficient number, since it is larger than the sum of its proper divisors (2171451407).

49943381809 is a wasteful number, since it uses less digits than its factorization.

49943381809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171451406.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 49943381809 in words is "forty-nine billion, nine hundred forty-three million, three hundred eighty-one thousand, eight hundred nine".