6731700864 has 128 divisors (see below), whose sum is σ = 21140438400. Its totient is φ = 1856999424.

The previous prime is 6731700863. The next prime is 6731700947. The reversal of 6731700864 is 4680071376.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (6731700863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34774 + ... + 121130.

It is an arithmetic number, because the mean of its divisors is an integer number (165159675).

Almost surely, 2^6731700864 is an apocalyptic number.

6731700864 is a gapful number since it is divisible by the number (64) 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 6731700864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10570219200).

6731700864 is an abundant number, since it is smaller than the sum of its proper divisors (14408737536).

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

6731700864 is a wasteful number, since it uses less digits than its factorization.

6731700864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86410 (or 86398 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 6731700864 is about 82046.9430509145. The cubic root of 6731700864 is about 1888.1722168865.

The spelling of 6731700864 in words is "six billion, seven hundred thirty-one million, seven hundred thousand, eight hundred sixty-four".