6418255872 has 416 divisors, whose sum is σ = 21136711680. Its totient is φ = 1692794880.

The previous prime is 6418255859. The next prime is 6418255873. The reversal of 6418255872 is 2785528146.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6418255873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77328343 + ... + 77328425.

Almost surely, 2^6418255872 is an apocalyptic number.

6418255872 is a gapful number since it is divisible by the number (62) 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 6418255872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10568355840).

6418255872 is an abundant number, since it is smaller than the sum of its proper divisors (14718455808).

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

6418255872 is a wasteful number, since it uses less digits than its factorization.

6418255872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 155 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 48.

The square root of 6418255872 is about 80114.0179494201. The cubic root of 6418255872 is about 1858.3991961445.

The spelling of 6418255872 in words is "six billion, four hundred eighteen million, two hundred fifty-five thousand, eight hundred seventy-two".