772081646 has 16 divisors (see below), whose sum is σ = 1324174176. Its totient is φ = 330740736.

The previous prime is 772081633. The next prime is 772081679. The reversal of 772081646 is 646180277.

772081646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×772081646² = 1192220136180138632, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22430 + ... + 45246.

It is an arithmetic number, because the mean of its divisors is an integer number (82760886).

Almost surely, 2^772081646 is an apocalyptic number.

772081646 is a deficient number, since it is larger than the sum of its proper divisors (552092530).

772081646 is a wasteful number, since it uses less digits than its factorization.

772081646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25243.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 772081646 is about 27786.3571919746. The cubic root of 772081646 is about 917.3908612049.

The spelling of 772081646 in words is "seven hundred seventy-two million, eighty-one thousand, six hundred forty-six".