778337903616 has 352 divisors, whose sum is σ = 2607667077120. Its totient is φ = 200904966144.

The previous prime is 778337903593. The next prime is 778337903659. The reversal of 778337903616 is 616309733877.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 778337903616.

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, 13109325 + ... + 13168563.

Almost surely, 2^778337903616 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 778337903616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1303833538560).

778337903616 is an abundant number, since it is smaller than the sum of its proper divisors (1829329173504).

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

778337903616 is a wasteful number, since it uses less digits than its factorization.

778337903616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59329 (or 59311 counting only the distinct ones).

The product of its (nonzero) digits is 24004512, while the sum is 60.

The spelling of 778337903616 in words is "seven hundred seventy-eight billion, three hundred thirty-seven million, nine hundred three thousand, six hundred sixteen".