6390886512 has 80 divisors (see below), whose sum is σ = 17426245760. Its totient is φ = 2012656896.

The previous prime is 6390886511. The next prime is 6390886553. The reversal of 6390886512 is 2156880936.

It is a happy number.

It is a super-2 number, since 2×6390886512² = 81686860818527052288, which contains 22 as substring.

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 (6390886511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330783 + ... + 349569.

It is an arithmetic number, because the mean of its divisors is an integer number (217828072).

Almost surely, 2^6390886512 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 6390886512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8713122880).

6390886512 is an abundant number, since it is smaller than the sum of its proper divisors (11035359248).

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

6390886512 is a wasteful number, since it uses less digits than its factorization.

6390886512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19190 (or 19184 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 6390886512 is about 79943.0204082883. The cubic root of 6390886512 is about 1855.7538426390.

The spelling of 6390886512 in words is "six billion, three hundred ninety million, eight hundred eighty-six thousand, five hundred twelve".