4921349849 has 16 divisors (see below), whose sum is σ = 5323585680. Its totient is φ = 4522552320.

The previous prime is 4921349801. The next prime is 4921349869. The reversal of 4921349849 is 9489431294.

It can be written as a sum of positive squares in 8 ways, for example, as 779526400 + 4141823449 = 27920^2 + 64357^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4921349849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4921349849.

It is not an unprimeable number, because it can be changed into a prime (4921349869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3853199 + ... + 3854475.

It is an arithmetic number, because the mean of its divisors is an integer number (332724105).

Almost surely, 2^4921349849 is an apocalyptic number.

It is an amenable number.

4921349849 is a deficient number, since it is larger than the sum of its proper divisors (402235831).

4921349849 is a wasteful number, since it uses less digits than its factorization.

4921349849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380.

The product of its digits is 2239488, while the sum is 53.

The square root of 4921349849 is about 70152.3331686124. Note that the first 3 decimals coincide. The cubic root of 4921349849 is about 1700.9625286223.

The spelling of 4921349849 in words is "four billion, nine hundred twenty-one million, three hundred forty-nine thousand, eight hundred forty-nine".