50000049981 has 32 divisors (see below), whose sum is σ = 84692486400. Its totient is φ = 28559200320.

The previous prime is 50000049973. The next prime is 50000049989. The reversal of 50000049981 is 18994000005.

It is an interprime number because it is at equal distance from previous prime (50000049973) and next prime (50000049989).

It is not a de Polignac number, because 50000049981 - 2³ = 50000049973 is a prime.

It is a super-2 number, since 2×50000049981² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50000049989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 394455 + ... + 505563.

It is an arithmetic number, because the mean of its divisors is an integer number (2646640200).

Almost surely, 2^50000049981 is an apocalyptic number.

It is an amenable number.

50000049981 is a deficient number, since it is larger than the sum of its proper divisors (34692436419).

50000049981 is a wasteful number, since it uses less digits than its factorization.

50000049981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113506 (or 113500 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

Adding to 50000049981 its reverse (18994000005), we get a palindrome (68994049986).

The spelling of 50000049981 in words is "fifty billion, forty-nine thousand, nine hundred eighty-one".