50005550981 has 2 divisors, whose sum is σ = 50005550982. Its totient is φ = 50005550980.

The previous prime is 50005550951. The next prime is 50005551019. The reversal of 50005550981 is 18905550005.

It is an a-pointer prime, because the next prime (50005551019) can be obtained adding 50005550981 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49066680100 + 938870881 = 221510^2 + 30641^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50005550981 is a prime.

It is a super-2 number, since 2×50005550981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50005550951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25002775490 + 25002775491.

It is an arithmetic number, because the mean of its divisors is an integer number (25002775491).

Almost surely, 2^50005550981 is an apocalyptic number.

It is an amenable number.

50005550981 is a deficient number, since it is larger than the sum of its proper divisors (1).

50005550981 is an equidigital number, since it uses as much as digits as its factorization.

50005550981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45000, while the sum is 38.

The spelling of 50005550981 in words is "fifty billion, five million, five hundred fifty thousand, nine hundred eighty-one".