50290078081 has 4 divisors (see below), whose sum is σ = 50290527700. Its totient is φ = 50289628464.

The previous prime is 50290078031. The next prime is 50290078087. The reversal of 50290078081 is 18087009205.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 23139277456 + 27150800625 = 152116^2 + 164775^2 .

It is a cyclic number.

It is not a de Polignac number, because 50290078081 - 2⁷ = 50290077953 is a prime.

It is a super-2 number, since 2×50290078081² (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 (50290078087) 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 3 ways as a sum of consecutive naturals, for example, 88735 + ... + 329323.

It is an arithmetic number, because the mean of its divisors is an integer number (12572631925).

Almost surely, 2^50290078081 is an apocalyptic number.

It is an amenable number.

50290078081 is a deficient number, since it is larger than the sum of its proper divisors (449619).

50290078081 is a wasteful number, since it uses less digits than its factorization.

50290078081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449618.

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 50290078081 in words is "fifty billion, two hundred ninety million, seventy-eight thousand, eighty-one".