780648730752 has 128 divisors (see below), whose sum is σ = 2262512347200. Its totient is φ = 236517847040.

The previous prime is 780648730733. The next prime is 780648730777. The reversal of 780648730752 is 257037846087.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 780648730692 and 780648730701.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30015418 + ... + 30041414.

Almost surely, 2^780648730752 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 780648730752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1131256173600).

780648730752 is an abundant number, since it is smaller than the sum of its proper divisors (1481863616448).

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

780648730752 is a wasteful number, since it uses less digits than its factorization.

780648730752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33134 (or 33122 counting only the distinct ones).

The product of its (nonzero) digits is 15805440, while the sum is 57.

The spelling of 780648730752 in words is "seven hundred eighty billion, six hundred forty-eight million, seven hundred thirty thousand, seven hundred fifty-two".