4521697481 has 8 divisors (see below), whose sum is σ = 5188244544. Its totient is φ = 3860298000.

The previous prime is 4521697471. The next prime is 4521697493. The reversal of 4521697481 is 1847961254.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4521697481 is a prime.

It is a super-2 number, since 2×4521697481² = 40891496219363490722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4521697441) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1285010 + ... + 1288523.

It is an arithmetic number, because the mean of its divisors is an integer number (648530568).

Almost surely, 2^4521697481 is an apocalyptic number.

It is an amenable number.

4521697481 is a deficient number, since it is larger than the sum of its proper divisors (666547063).

4521697481 is a wasteful number, since it uses less digits than its factorization.

4521697481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573791.

The product of its digits is 483840, while the sum is 47.

The square root of 4521697481 is about 67243.5683244130. The cubic root of 4521697481 is about 1653.6128342352.

The spelling of 4521697481 in words is "four billion, five hundred twenty-one million, six hundred ninety-seven thousand, four hundred eighty-one".