775982649 has 8 divisors (see below), whose sum is σ = 1114231552. Its totient is φ = 477527760.

The previous prime is 775982633. The next prime is 775982653. The reversal of 775982649 is 946289577.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 775982649 - 2⁴ = 775982633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (775982149) 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, 9948457 + ... + 9948534.

It is an arithmetic number, because the mean of its divisors is an integer number (139278944).

Almost surely, 2^775982649 is an apocalyptic number.

It is an amenable number.

775982649 is a deficient number, since it is larger than the sum of its proper divisors (338248903).

775982649 is a wasteful number, since it uses less digits than its factorization.

775982649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19897007.

The product of its digits is 7620480, while the sum is 57.

The square root of 775982649 is about 27856.4651203271. The cubic root of 775982649 is about 918.9333293650.

The spelling of 775982649 in words is "seven hundred seventy-five million, nine hundred eighty-two thousand, six hundred forty-nine".