128496650240 has 384 divisors, whose sum is σ = 376847976960. Its totient is φ = 41091072000.

The previous prime is 128496650237. The next prime is 128496650257. The reversal of 128496650240 is 42056694821.

It is a super-2 number, since 2×128496650240² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 67593290 + ... + 67595190.

It is an arithmetic number, because the mean of its divisors is an integer number (981374940).

Almost surely, 2^128496650240 is an apocalyptic number.

128496650240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128496650240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188423988480).

128496650240 is an abundant number, since it is smaller than the sum of its proper divisors (248351326720).

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

128496650240 is a wasteful number, since it uses less digits than its factorization.

128496650240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999 (or 1979 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 128496650240 in words is "one hundred twenty-eight billion, four hundred ninety-six million, six hundred fifty thousand, two hundred forty".