778048651632 has 160 divisors (see below), whose sum is σ = 2360387814400. Its totient is φ = 216180762624.

The previous prime is 778048651613. The next prime is 778048651661. The reversal of 778048651632 is 236156840877.

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, 25955469 + ... + 25985427.

It is an arithmetic number, because the mean of its divisors is an integer number (14752423840).

Almost surely, 2^778048651632 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 778048651632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1180193907200).

778048651632 is an abundant number, since it is smaller than the sum of its proper divisors (1582339162768).

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

778048651632 is a wasteful number, since it uses less digits than its factorization.

778048651632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32103 (or 32097 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 778048651632 in words is "seven hundred seventy-eight billion, forty-eight million, six hundred fifty-one thousand, six hundred thirty-two".