772064509 has 4 divisors (see below), whose sum is σ = 777246300. Its totient is φ = 766882720.

The previous prime is 772064507. The next prime is 772064539. The reversal of 772064509 is 905460277.

772064509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 237067609 + 534996900 = 15397^2 + 23130^2 .

It is a cyclic number.

It is not a de Polignac number, because 772064509 - 2¹ = 772064507 is a prime.

It is a super-2 number, since 2×772064509² = 1192167212114822162, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772064507) 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, 2590672 + ... + 2590969.

It is an arithmetic number, because the mean of its divisors is an integer number (194311575).

Almost surely, 2^772064509 is an apocalyptic number.

It is an amenable number.

772064509 is a deficient number, since it is larger than the sum of its proper divisors (5181791).

772064509 is a wasteful number, since it uses less digits than its factorization.

772064509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5181790.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 772064509 is about 27786.0488195065. The cubic root of 772064509 is about 917.3840737347.

The spelling of 772064509 in words is "seven hundred seventy-two million, sixty-four thousand, five hundred nine".