128235849050 has 12 divisors (see below), whose sum is σ = 238518679326. Its totient is φ = 51294339600.

The previous prime is 128235849019. The next prime is 128235849101. The reversal of 128235849050 is 50948532821.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 48339738769 + 79896110281 = 219863^2 + 282659^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128235848986 and 128235849004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1282358441 + ... + 1282358540.

Almost surely, 2^128235849050 is an apocalyptic number.

128235849050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128235849050 is a deficient number, since it is larger than the sum of its proper divisors (110282830276).

128235849050 is a wasteful number, since it uses less digits than its factorization.

128235849050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564716993 (or 2564716988 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 128235849050 in words is "one hundred twenty-eight billion, two hundred thirty-five million, eight hundred forty-nine thousand, fifty".