4651678729 has 2 divisors, whose sum is σ = 4651678730. Its totient is φ = 4651678728.

The previous prime is 4651678721. The next prime is 4651678751. The reversal of 4651678729 is 9278761564.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2813241600 + 1838437129 = 53040^2 + 42877^2 .

It is a cyclic number.

It is not a de Polignac number, because 4651678729 - 2³ = 4651678721 is a prime.

It is a super-2 number, since 2×4651678729² = 43276229995662110882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4651678729.

It is not a weakly prime, because it can be changed into another prime (4651678721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2325839364 + 2325839365.

It is an arithmetic number, because the mean of its divisors is an integer number (2325839365).

Almost surely, 2^4651678729 is an apocalyptic number.

It is an amenable number.

4651678729 is a deficient number, since it is larger than the sum of its proper divisors (1).

4651678729 is an equidigital number, since it uses as much as digits as its factorization.

4651678729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 55.

The square root of 4651678729 is about 68203.2164124244. The cubic root of 4651678729 is about 1669.3083692234.

The spelling of 4651678729 in words is "four billion, six hundred fifty-one million, six hundred seventy-eight thousand, seven hundred twenty-nine".