776507648 has 36 divisors (see below), whose sum is σ = 1771412160. Its totient is φ = 332788224.

The previous prime is 776507647. The next prime is 776507659. The reversal of 776507648 is 846705677.

It is a junction number, because it is equal to n+sod(n) for n = 776507596 and 776507605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (776507647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214868 + ... + 218451.

Almost surely, 2^776507648 is an apocalyptic number.

It is an amenable number.

776507648 is an abundant number, since it is smaller than the sum of its proper divisors (994904512).

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

776507648 is an equidigital number, since it uses as much as digits as its factorization.

776507648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433342 (or 433328 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 50.

The square root of 776507648 is about 27865.8868152442. The cubic root of 776507648 is about 919.1405205613.

The spelling of 776507648 in words is "seven hundred seventy-six million, five hundred seven thousand, six hundred forty-eight".