605139994450 has 24 divisors (see below), whose sum is σ = 1126055788308. Its totient is φ = 241949460480.

The previous prime is 605139994399. The next prime is 605139994451. The reversal of 605139994450 is 54499931506.

It can be written as a sum of positive squares in 6 ways, for example, as 412653349161 + 192486645289 = 642381^2 + 438733^2 .

It is a junction number, because it is equal to n+sod(n) for n = 605139994391 and 605139994400.

It is not an unprimeable number, because it can be changed into a prime (605139994451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2548647 + ... + 2775946.

Almost surely, 2^605139994450 is an apocalyptic number.

605139994450 is a deficient number, since it is larger than the sum of its proper divisors (520915793858).

605139994450 is a wasteful number, since it uses less digits than its factorization.

605139994450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5326878 (or 5326873 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 55.

The spelling of 605139994450 in words is "six hundred five billion, one hundred thirty-nine million, nine hundred ninety-four thousand, four hundred fifty".