4661221456 has 10 divisors (see below), whose sum is σ = 9031116602. Its totient is φ = 2330610720.

The previous prime is 4661221447. The next prime is 4661221463. The reversal of 4661221456 is 6541221664.

It can be written as a sum of positive squares in only one way, i.e., 4542760000 + 118461456 = 67400^2 + 10884^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 145663155 + ... + 145663186.

Almost surely, 2^4661221456 is an apocalyptic number.

It is an amenable number.

4661221456 is a deficient number, since it is larger than the sum of its proper divisors (4369895146).

4661221456 is a wasteful number, since it uses less digits than its factorization.

4661221456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291326349 (or 291326343 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 4661221456 is about 68273.1386124880. The cubic root of 4661221456 is about 1670.4490952777.

The spelling of 4661221456 in words is "four billion, six hundred sixty-one million, two hundred twenty-one thousand, four hundred fifty-six".