780256641024 has 512 divisors, whose sum is σ = 2797893619200. Its totient is φ = 209788600320.

The previous prime is 780256640993. The next prime is 780256641079. The reversal of 780256641024 is 420146652087.

780256641024 is a `hidden beast` number, since 7 + 80 + 2 + 566 + 4 + 1 + 0 + 2 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (512).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105279879 + ... + 105287289.

It is an arithmetic number, because the mean of its divisors is an integer number (5464635975).

Almost surely, 2^780256641024 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 780256641024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1398946809600).

780256641024 is an abundant number, since it is smaller than the sum of its proper divisors (2017636978176).

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

780256641024 is an equidigital number, since it uses as much as digits as its factorization.

780256641024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7474 (or 7440 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 780256641024 in words is "seven hundred eighty billion, two hundred fifty-six million, six hundred forty-one thousand, twenty-four".