776344656 has 160 divisors (see below), whose sum is σ = 2171289600. Its totient is φ = 238533120.

The previous prime is 776344651. The next prime is 776344711. The reversal of 776344656 is 656443677.

It is a super-2 number, since 2×776344656² = 1205422049799516672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (776344651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3248185 + ... + 3248423.

It is an arithmetic number, because the mean of its divisors is an integer number (13570560).

Almost surely, 2^776344656 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 776344656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1085644800).

776344656 is an abundant number, since it is smaller than the sum of its proper divisors (1394944944).

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

776344656 is a wasteful number, since it uses less digits than its factorization.

776344656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 371 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 48.

The square root of 776344656 is about 27862.9620823056. The cubic root of 776344656 is about 919.0762056614.

The spelling of 776344656 in words is "seven hundred seventy-six million, three hundred forty-four thousand, six hundred fifty-six".