4640681853 has 12 divisors (see below), whose sum is σ = 6762529020. Its totient is φ = 3066408576.

The previous prime is 4640681849. The next prime is 4640681861. The reversal of 4640681853 is 3581860464.

4640681853 is a `hidden beast` number, since 464 + 0 + 6 + 8 + 185 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1558433529 + 3082248324 = 39477^2 + 55518^2 .

It is not a de Polignac number, because 4640681853 - 2² = 4640681849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4640681799 and 4640681808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4640681153) 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 11 ways as a sum of consecutive naturals, for example, 2280538 + ... + 2282571.

It is an arithmetic number, because the mean of its divisors is an integer number (563544085).

Almost surely, 2^4640681853 is an apocalyptic number.

It is an amenable number.

4640681853 is a deficient number, since it is larger than the sum of its proper divisors (2121847167).

4640681853 is a wasteful number, since it uses less digits than its factorization.

4640681853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4563228 (or 4563225 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 4640681853 is about 68122.5502532018. The cubic root of 4640681853 is about 1667.9918794784.

The spelling of 4640681853 in words is "four billion, six hundred forty million, six hundred eighty-one thousand, eight hundred fifty-three".