755808781440 has 128 divisors (see below), whose sum is σ = 2413767755520. Its totient is φ = 201161891840.

The previous prime is 755808781439. The next prime is 755808781447. The reversal of 755808781440 is 44187808557.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (755808781447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 622537 + ... + 1378103.

It is an arithmetic number, because the mean of its divisors is an integer number (18857560590).

Almost surely, 2^755808781440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 755808781440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1206883877760).

755808781440 is an abundant number, since it is smaller than the sum of its proper divisors (1657958974080).

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

755808781440 is a wasteful number, since it uses less digits than its factorization.

755808781440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756110 (or 756098 counting only the distinct ones).

The product of its (nonzero) digits is 10035200, while the sum is 57.

The spelling of 755808781440 in words is "seven hundred fifty-five billion, eight hundred eight million, seven hundred eighty-one thousand, four hundred forty".