4501685681 has 2 divisors, whose sum is σ = 4501685682. Its totient is φ = 4501685680.

The previous prime is 4501685621. The next prime is 4501685711. The reversal of 4501685681 is 1865861054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3359245681 + 1142440000 = 57959^2 + 33800^2 .

It is a cyclic number.

It is not a de Polignac number, because 4501685681 - 2¹⁰ = 4501684657 is a prime.

It is a super-2 number, since 2×4501685681² = 40530347941040867522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4501685611) 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 as a sum of consecutive naturals, namely, 2250842840 + 2250842841.

It is an arithmetic number, because the mean of its divisors is an integer number (2250842841).

Almost surely, 2^4501685681 is an apocalyptic number.

It is an amenable number.

4501685681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4501685681 is an equidigital number, since it uses as much as digits as its factorization.

4501685681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 44.

The square root of 4501685681 is about 67094.6024729262. The cubic root of 4501685681 is about 1651.1697467129.

The spelling of 4501685681 in words is "four billion, five hundred one million, six hundred eighty-five thousand, six hundred eighty-one".