999980000050 has 24 divisors (see below), whose sum is σ = 1861763441076. Its totient is φ = 399604765440.

The previous prime is 999980000029. The next prime is 999980000087. The reversal of 999980000050 is 50000089999.

It can be written as a sum of positive squares in 6 ways, for example, as 744774178009 + 255205822041 = 863003^2 + 505179^2 .

It is a junction number, because it is equal to n+sod(n) for n = 999979999949 and 999980000003.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9628699 + ... + 9731998.

Almost surely, 2^999980000050 is an apocalyptic number.

999980000050 is a deficient number, since it is larger than the sum of its proper divisors (861783441026).

999980000050 is a wasteful number, since it uses less digits than its factorization.

999980000050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19361742 (or 19361737 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 49.

The spelling of 999980000050 in words is "nine hundred ninety-nine billion, nine hundred eighty million, fifty", and thus it is an aban number.