4828121861 has 4 divisors (see below), whose sum is σ = 4831037292. Its totient is φ = 4825206432.

The previous prime is 4828121813. The next prime is 4828121923. The reversal of 4828121861 is 1681218284.

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 3226921636 + 1601200225 = 56806^2 + 40015^2 .

It is a cyclic number.

It is not a de Polignac number, because 4828121861 - 2¹⁸ = 4827859717 is a prime.

It is a super-2 number, since 2×4828121861² = 46621521409332206642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4828121801) 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 3 ways as a sum of consecutive naturals, for example, 1455230 + ... + 1458543.

It is an arithmetic number, because the mean of its divisors is an integer number (1207759323).

Almost surely, 2^4828121861 is an apocalyptic number.

It is an amenable number.

4828121861 is a deficient number, since it is larger than the sum of its proper divisors (2915431).

4828121861 is a wasteful number, since it uses less digits than its factorization.

4828121861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2915430.

The product of its digits is 49152, while the sum is 41.

The square root of 4828121861 is about 69484.6879607299. The cubic root of 4828121861 is about 1690.1532091533.

The spelling of 4828121861 in words is "four billion, eight hundred twenty-eight million, one hundred twenty-one thousand, eight hundred sixty-one".