4461521491 has 12 divisors (see below), whose sum is σ = 5267398728. Its totient is φ = 3767081472.

The previous prime is 4461521489. The next prime is 4461521507. The reversal of 4461521491 is 1941251644.

It is not a de Polignac number, because 4461521491 - 2¹ = 4461521489 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 4461521491.

It is not an unprimeable number, because it can be changed into a prime (4461521431) 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 11 ways as a sum of consecutive naturals, for example, 676206 + ... + 682771.

It is an arithmetic number, because the mean of its divisors is an integer number (438949894).

Almost surely, 2^4461521491 is an apocalyptic number.

4461521491 is a deficient number, since it is larger than the sum of its proper divisors (805877237).

4461521491 is a wasteful number, since it uses less digits than its factorization.

4461521491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359058 (or 1359051 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 4461521491 is about 66794.6217221117. The cubic root of 4461521491 is about 1646.2444725110.

The spelling of 4461521491 in words is "four billion, four hundred sixty-one million, five hundred twenty-one thousand, four hundred ninety-one".