50000561000 has 64 divisors (see below), whose sum is σ = 126001446480. Its totient is φ = 18461740800.

The previous prime is 50000560927. The next prime is 50000561003. The reversal of 50000561000 is 16500005.

It can be written as a sum of positive squares in 8 ways, for example, as 6337115236 + 43663445764 = 79606^2 + 208958^2 .

It is a super-2 number, since 2×50000561000² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 50000561000.

It is not an unprimeable number, because it can be changed into a prime (50000561003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1910099 + ... + 1936098.

Almost surely, 2^50000561000 is an apocalyptic number.

50000561000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

50000561000 is an abundant number, since it is smaller than the sum of its proper divisors (76000885480).

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

50000561000 is a wasteful number, since it uses less digits than its factorization.

50000561000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3846231 (or 3846217 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The spelling of 50000561000 in words is "fifty billion, five hundred sixty-one thousand".