6859491520 has 224 divisors, whose sum is σ = 19415126016. Its totient is φ = 2258841600.

The previous prime is 6859491493. The next prime is 6859491559. The reversal of 6859491520 is 251949586.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12012835 + ... + 12013405.

Almost surely, 2^6859491520 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 6859491520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9707563008).

6859491520 is an abundant number, since it is smaller than the sum of its proper divisors (12555634496).

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

6859491520 is a wasteful number, since it uses less digits than its factorization.

6859491520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 49.

The square root of 6859491520 is about 82822.0473062578. The cubic root of 6859491520 is about 1900.0453839575.

The spelling of 6859491520 in words is "six billion, eight hundred fifty-nine million, four hundred ninety-one thousand, five hundred twenty".