4645109681 has 2 divisors, whose sum is σ = 4645109682. Its totient is φ = 4645109680.

The previous prime is 4645109659. The next prime is 4645109747. The reversal of 4645109681 is 1869015464.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2871352225 + 1773757456 = 53585^2 + 42116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4645109681 is a prime.

It is a super-2 number, since 2×4645109681² = 43154087897039843522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4645109881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2322554840 + 2322554841.

It is an arithmetic number, because the mean of its divisors is an integer number (2322554841).

Almost surely, 2^4645109681 is an apocalyptic number.

It is an amenable number.

4645109681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4645109681 is an equidigital number, since it uses as much as digits as its factorization.

4645109681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 4645109681 is about 68155.0414936415. The cubic root of 4645109681 is about 1668.5222062482.

The spelling of 4645109681 in words is "four billion, six hundred forty-five million, one hundred nine thousand, six hundred eighty-one".