6309999864 has 288 divisors, whose sum is σ = 20921472000. Its totient is φ = 1682508672.

The previous prime is 6309999851. The next prime is 6309999889. The reversal of 6309999864 is 4689999036.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 14373357 + ... + 14373795.

It is an arithmetic number, because the mean of its divisors is an integer number (72644000).

Almost surely, 2^6309999864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6309999864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10460736000).

6309999864 is an abundant number, since it is smaller than the sum of its proper divisors (14611472136).

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

6309999864 is a wasteful number, since it uses less digits than its factorization.

6309999864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 63.

The square root of 6309999864 is about 79435.5075769017. The cubic root of 6309999864 is about 1847.8914241601.

The spelling of 6309999864 in words is "six billion, three hundred nine million, nine hundred ninety-nine thousand, eight hundred sixty-four".