4521456681 has 32 divisors (see below), whose sum is σ = 7015249920. Its totient is φ = 2536769664.

The previous prime is 4521456637. The next prime is 4521456707. The reversal of 4521456681 is 1866541254.

It is not a de Polignac number, because 4521456681 - 2⁶ = 4521456617 is a prime.

It is a super-2 number, since 2×4521456681² = 40887141036319071522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4521456601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1315341 + ... + 1318773.

It is an arithmetic number, because the mean of its divisors is an integer number (219226560).

Almost surely, 2^4521456681 is an apocalyptic number.

It is an amenable number.

4521456681 is a deficient number, since it is larger than the sum of its proper divisors (2493793239).

4521456681 is a wasteful number, since it uses less digits than its factorization.

4521456681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4565.

The product of its digits is 230400, while the sum is 42.

The square root of 4521456681 is about 67241.7777947609. Note that the first 4 decimals coincide. The cubic root of 4521456681 is about 1653.5834796959.

The spelling of 4521456681 in words is "four billion, five hundred twenty-one million, four hundred fifty-six thousand, six hundred eighty-one".