10256439785320 has 128 divisors (see below), whose sum is σ = 24371062531200. Its totient is φ = 3873952825344.

The previous prime is 10256439785311. The next prime is 10256439785321. The reversal of 10256439785320 is 2358793465201.

It is not an unprimeable number, because it can be changed into a prime (10256439785321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289769544 + ... + 289804936.

It is an arithmetic number, because the mean of its divisors is an integer number (190398926025).

It is a 1-persistent number, because it is pandigital, but 2⋅10256439785320 = 20512879570640 is not.

Almost surely, 2^{10256439785320} is an apocalyptic number.

10256439785320 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 10256439785320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12185531265600).

10256439785320 is an abundant number, since it is smaller than the sum of its proper divisors (14114622745880).

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

10256439785320 is a wasteful number, since it uses less digits than its factorization.

10256439785320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36659 (or 36655 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 10256439785320 in words is "ten trillion, two hundred fifty-six billion, four hundred thirty-nine million, seven hundred eighty-five thousand, three hundred twenty".