4255678621 has 4 divisors (see below), whose sum is σ = 4257024700. Its totient is φ = 4254332544.

The previous prime is 4255678601. The next prime is 4255678657. The reversal of 4255678621 is 1268765524.

4255678621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3426814521 + 828864100 = 58539^2 + 28790^2 .

It is a cyclic number.

It is not a de Polignac number, because 4255678621 - 2²¹ = 4253581469 is a prime.

It is a super-3 number, since 3×4255678621³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4255678601) 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, 668286 + ... + 674623.

It is an arithmetic number, because the mean of its divisors is an integer number (1064256175).

Almost surely, 2^4255678621 is an apocalyptic number.

It is an amenable number.

4255678621 is a deficient number, since it is larger than the sum of its proper divisors (1346079).

4255678621 is a wasteful number, since it uses less digits than its factorization.

4255678621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346078.

The product of its digits is 806400, while the sum is 46.

The square root of 4255678621 is about 65235.5625483524. The cubic root of 4255678621 is about 1620.5270120191.

The spelling of 4255678621 in words is "four billion, two hundred fifty-five million, six hundred seventy-eight thousand, six hundred twenty-one".