780265013808 has 120 divisors (see below), whose sum is σ = 2345254114368. Its totient is φ = 222887403648.

The previous prime is 780265013777. The next prime is 780265013821. The reversal of 780265013808 is 808310562087.

It is a Harshad number since it is a multiple of its sum of digits (48).

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 23 ways as a sum of consecutive naturals, for example, 12488535 + ... + 12550857.

Almost surely, 2^780265013808 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 780265013808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1172627057184).

780265013808 is an abundant number, since it is smaller than the sum of its proper divisors (1564989100560).

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

780265013808 is a wasteful number, since it uses less digits than its factorization.

780265013808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67671 (or 67658 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 780265013808 in words is "seven hundred eighty billion, two hundred sixty-five million, thirteen thousand, eight hundred eight".