778125912 has 64 divisors (see below), whose sum is σ = 2025496800. Its totient is φ = 248801280.

The previous prime is 778125889. The next prime is 778125961. The reversal of 778125912 is 219521877.

It is a congruent number.

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, 105712 + ... + 112832.

Almost surely, 2^778125912 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 778125912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1012748400).

778125912 is an abundant number, since it is smaller than the sum of its proper divisors (1247370888).

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

778125912 is a wasteful number, since it uses less digits than its factorization.

778125912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7316 (or 7312 counting only the distinct ones).

The product of its digits is 70560, while the sum is 42.

The square root of 778125912 is about 27894.9083526008. The cubic root of 778125912 is about 919.7785825063.

The spelling of 778125912 in words is "seven hundred seventy-eight million, one hundred twenty-five thousand, nine hundred twelve".