772816578 has 16 divisors (see below), whose sum is σ = 1555117536. Its totient is φ = 256024800.

The previous prime is 772816559. The next prime is 772816579. The reversal of 772816578 is 875618277.

It is a self number, because there is not a number n which added to its sum of digits gives 772816578.

It is not an unprimeable number, because it can be changed into a prime (772816579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394123 + ... + 396078.

It is an arithmetic number, because the mean of its divisors is an integer number (97194846).

Almost surely, 2^772816578 is an apocalyptic number.

772816578 is an abundant number, since it is smaller than the sum of its proper divisors (782300958).

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

772816578 is a wasteful number, since it uses less digits than its factorization.

772816578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790369.

The product of its digits is 1317120, while the sum is 51.

The square root of 772816578 is about 27799.5787378154. The cubic root of 772816578 is about 917.6818520566.

The spelling of 772816578 in words is "seven hundred seventy-two million, eight hundred sixteen thousand, five hundred seventy-eight".