50917821906 has 16 divisors (see below), whose sum is σ = 116383593024. Its totient is φ = 14547949104.

The previous prime is 50917821901. The next prime is 50917821917. The reversal of 50917821906 is 60912871905.

It is a super-2 number, since 2×50917821906² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (50917821901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606164505 + ... + 606164588.

It is an arithmetic number, because the mean of its divisors is an integer number (7273974564).

Almost surely, 2^50917821906 is an apocalyptic number.

50917821906 is an abundant number, since it is smaller than the sum of its proper divisors (65465771118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

50917821906 is a wasteful number, since it uses less digits than its factorization.

50917821906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212329105.

The product of its (nonzero) digits is 272160, while the sum is 48.

The spelling of 50917821906 in words is "fifty billion, nine hundred seventeen million, eight hundred twenty-one thousand, nine hundred six".