6399158976 has 224 divisors, whose sum is σ = 21797345280. Its totient is φ = 1803036672.

The previous prime is 6399158959. The next prime is 6399158977. The reversal of 6399158976 is 6798519936.

6399158976 is a `hidden beast` number, since 6 + 399 + 158 + 97 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (224).

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

It is not an unprimeable number, because it can be changed into a prime (6399158977) 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, 879385 + ... + 886631.

Almost surely, 2^6399158976 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 6399158976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10898672640).

6399158976 is an abundant number, since it is smaller than the sum of its proper divisors (15398186304).

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

6399158976 is a wasteful number, since it uses less digits than its factorization.

6399158976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7348 (or 7332 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 63.

The square root of 6399158976 is about 79994.7434273028. The cubic root of 6399158976 is about 1856.5542030573.

The spelling of 6399158976 in words is "six billion, three hundred ninety-nine million, one hundred fifty-eight thousand, nine hundred seventy-six".