776504656 has 40 divisors (see below), whose sum is σ = 1578006144. Its totient is φ = 369452160.

The previous prime is 776504653. The next prime is 776504669. The reversal of 776504656 is 656405677.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (776504653) 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 7 ways as a sum of consecutive naturals, for example, 67141 + ... + 77851.

Almost surely, 2^776504656 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 776504656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (789003072).

776504656 is an abundant number, since it is smaller than the sum of its proper divisors (801501488).

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

776504656 is a wasteful number, since it uses less digits than its factorization.

776504656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10939 (or 10933 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 46.

The square root of 776504656 is about 27865.8331294795. The cubic root of 776504656 is about 919.1393400312.

The spelling of 776504656 in words is "seven hundred seventy-six million, five hundred four thousand, six hundred fifty-six".