4681621807 has 4 divisors (see below), whose sum is σ = 4681766320. Its totient is φ = 4681477296.

The previous prime is 4681621787. The next prime is 4681621909. The reversal of 4681621807 is 7081261864.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4681621807 - 2¹⁵ = 4681589039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4681621207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1294 + ... + 96772.

It is an arithmetic number, because the mean of its divisors is an integer number (1170441580).

Almost surely, 2^4681621807 is an apocalyptic number.

4681621807 is a deficient number, since it is larger than the sum of its proper divisors (144513).

4681621807 is an equidigital number, since it uses as much as digits as its factorization.

4681621807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144512.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 4681621807 is about 68422.3779694918. The cubic root of 4681621807 is about 1672.8825170542.

The spelling of 4681621807 in words is "four billion, six hundred eighty-one million, six hundred twenty-one thousand, eight hundred seven".