774225561 has 8 divisors (see below), whose sum is σ = 1038876544. Its totient is φ = 512862480.

The previous prime is 774225541. The next prime is 774225587. The reversal of 774225561 is 165522477.

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

It is a de Polignac number, because none of the positive numbers 2^k-774225561 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 (774225521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821425 + ... + 822366.

It is an arithmetic number, because the mean of its divisors is an integer number (129859568).

Almost surely, 2^774225561 is an apocalyptic number.

It is an amenable number.

774225561 is a deficient number, since it is larger than the sum of its proper divisors (264650983).

774225561 is a wasteful number, since it uses less digits than its factorization.

774225561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643951.

The product of its digits is 117600, while the sum is 39.

The square root of 774225561 is about 27824.9090025466. The cubic root of 774225561 is about 918.2392129154.

The spelling of 774225561 in words is "seven hundred seventy-four million, two hundred twenty-five thousand, five hundred sixty-one".