4255640520 has 128 divisors (see below), whose sum is σ = 13481856000. Its totient is φ = 1071671040.

The previous prime is 4255640513. The next prime is 4255640531. The reversal of 4255640520 is 250465524.

It is a super-2 number, since 2×4255640520² = 36220952470931740800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 751861 + ... + 757499.

It is an arithmetic number, because the mean of its divisors is an integer number (105327000).

Almost surely, 2^4255640520 is an apocalyptic number.

4255640520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4255640520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6740928000).

4255640520 is an abundant number, since it is smaller than the sum of its proper divisors (9226215480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4255640520 is a wasteful number, since it uses less digits than its factorization.

4255640520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6003 (or 5999 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

The square root of 4255640520 is about 65235.2705213982. The cubic root of 4255640520 is about 1620.5221758234.

The spelling of 4255640520 in words is "four billion, two hundred fifty-five million, six hundred forty thousand, five hundred twenty".