776478431376 has 30 divisors (see below), whose sum is σ = 2173061165990. Its totient is φ = 258826143744.

The previous prime is 776478431371. The next prime is 776478431413. The reversal of 776478431376 is 673134874677.

It is a happy number.

776478431376 is a `hidden beast` number, since 7 + 7 + 64 + 78 + 431 + 3 + 76 = 666.

It can be written as a sum of positive squares in only one way, i.e., 620156250000 + 156322181376 = 787500^2 + 395376^2 .

It is not an unprimeable number, because it can be changed into a prime (776478431371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2696105521 + ... + 2696105808.

Almost surely, 2^776478431376 is an apocalyptic number.

It is an amenable number.

776478431376 is an abundant number, since it is smaller than the sum of its proper divisors (1396582734614).

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

776478431376 is a wasteful number, since it uses less digits than its factorization.

776478431376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5392211343 (or 5392211334 counting only the distinct ones).

The product of its digits is 99574272, while the sum is 63.

The spelling of 776478431376 in words is "seven hundred seventy-six billion, four hundred seventy-eight million, four hundred thirty-one thousand, three hundred seventy-six".