4678638277 has 4 divisors (see below), whose sum is σ = 4678777900. Its totient is φ = 4678498656.

The previous prime is 4678638253. The next prime is 4678638281. The reversal of 4678638277 is 7728368764.

It is a happy number.

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 can be written as a sum of positive squares in 2 ways, for example, as 3052452001 + 1626186276 = 55249^2 + 40326^2 .

It is a 3-Lehmer number, since φ(4678638277) divides (4678638277-1)³.

It is a cyclic number.

It is not a de Polignac number, because 4678638277 - 2⁷ = 4678638149 is a prime.

It is a super-2 number, since 2×4678638277² = 43779312254019057458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4678638287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13963 + ... + 97735.

It is an arithmetic number, because the mean of its divisors is an integer number (1169694475).

It is a Poulet number, since it divides 2^4678638276-1.

Almost surely, 2^4678638277 is an apocalyptic number.

4678638277 is the 55849-th pentagonal number.

It is an amenable number.

4678638277 is a deficient number, since it is larger than the sum of its proper divisors (139623).

4678638277 is an equidigital number, since it uses as much as digits as its factorization.

4678638277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139622.

The product of its digits is 18966528, while the sum is 58.

The square root of 4678638277 is about 68400.5721978990. The cubic root of 4678638277 is about 1672.5270735770.

The spelling of 4678638277 in words is "four billion, six hundred seventy-eight million, six hundred thirty-eight thousand, two hundred seventy-seven".