6381522420 has 192 divisors, whose sum is σ = 22072296960. Its totient is φ = 1341499392.

The previous prime is 6381522383. The next prime is 6381522451. The reversal of 6381522420 is 242251836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1597786 + ... + 1601774.

It is an arithmetic number, because the mean of its divisors is an integer number (114959880).

Almost surely, 2^6381522420 is an apocalyptic number.

6381522420 is a gapful number since it is divisible by the number (60) 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 6381522420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11036148480).

6381522420 is an abundant number, since it is smaller than the sum of its proper divisors (15690774540).

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

6381522420 is a wasteful number, since it uses less digits than its factorization.

6381522420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4314 (or 4312 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 6381522420 is about 79884.4316497276. The cubic root of 6381522420 is about 1854.8470334459.

The spelling of 6381522420 in words is "six billion, three hundred eighty-one million, five hundred twenty-two thousand, four hundred twenty".