3411556821 has 24 divisors (see below), whose sum is σ = 5303225304. Its totient is φ = 2105487360.

The previous prime is 3411556817. The next prime is 3411556847. The reversal of 3411556821 is 1286551143.

It can be written as a sum of positive squares in 4 ways, for example, as 72335025 + 3339221796 = 8505^2 + 57786^2 .

It is not a de Polignac number, because 3411556821 - 2² = 3411556817 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3411556801) 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 23 ways as a sum of consecutive naturals, for example, 173436 + ... + 192101.

It is an arithmetic number, because the mean of its divisors is an integer number (220967721).

Almost surely, 2^3411556821 is an apocalyptic number.

It is an amenable number.

3411556821 is a deficient number, since it is larger than the sum of its proper divisors (1891668483).

3411556821 is a wasteful number, since it uses less digits than its factorization.

3411556821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365621 (or 365618 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 3411556821 is about 58408.5338028614. The cubic root of 3411556821 is about 1505.3963880495.

The spelling of 3411556821 in words is "three billion, four hundred eleven million, five hundred fifty-six thousand, eight hundred twenty-one".