127809904850 has 12 divisors (see below), whose sum is σ = 237726423114. Its totient is φ = 51123961920.

The previous prime is 127809904841. The next prime is 127809904853. The reversal of 127809904850 is 58409908721.

It can be written as a sum of positive squares in 3 ways, for example, as 65215369129 + 62594535721 = 255373^2 + 250189^2 .

It is a junction number, because it is equal to n+sod(n) for n = 127809904792 and 127809904801.

It is not an unprimeable number, because it can be changed into a prime (127809904853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1278098999 + ... + 1278099098.

Almost surely, 2^127809904850 is an apocalyptic number.

127809904850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127809904850 is a deficient number, since it is larger than the sum of its proper divisors (109916518264).

127809904850 is a wasteful number, since it uses less digits than its factorization.

127809904850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556198109 (or 2556198104 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 127809904850 in words is "one hundred twenty-seven billion, eight hundred nine million, nine hundred four thousand, eight hundred fifty".