50278778881 has 16 divisors (see below), whose sum is σ = 51408000000. Its totient is φ = 49163864256.

The previous prime is 50278778873. The next prime is 50278778903. The reversal of 50278778881 is 18887787205.

It is a cyclic number.

It is not a de Polignac number, because 50278778881 - 2³ = 50278778873 is a prime.

It is a super-2 number, since 2×50278778881² (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 (50278778801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4101960 + ... + 4114198.

It is an arithmetic number, because the mean of its divisors is an integer number (3213000000).

Almost surely, 2^50278778881 is an apocalyptic number.

It is an amenable number.

50278778881 is a deficient number, since it is larger than the sum of its proper divisors (1129221119).

50278778881 is a wasteful number, since it uses less digits than its factorization.

50278778881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12816.

The product of its (nonzero) digits is 14049280, while the sum is 61.

The spelling of 50278778881 in words is "fifty billion, two hundred seventy-eight million, seven hundred seventy-eight thousand, eight hundred eighty-one".