6467542686 has 144 divisors (see below), whose sum is σ = 16135719600. Its totient is φ = 1939956480.

The previous prime is 6467542681. The next prime is 6467542693. The reversal of 6467542686 is 6862457646.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (11612160) is a multiple of the sum of its prime divisors (1134).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6467542681) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6409350 + ... + 6410358.

Almost surely, 2^6467542686 is an apocalyptic number.

6467542686 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6467542686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8067859800).

6467542686 is an abundant number, since it is smaller than the sum of its proper divisors (9668176914).

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

6467542686 is a wasteful number, since it uses less digits than its factorization.

6467542686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 1134 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 54.

The square root of 6467542686 is about 80421.0338530909. The cubic root of 6467542686 is about 1863.1440528999.

The spelling of 6467542686 in words is "six billion, four hundred sixty-seven million, five hundred forty-two thousand, six hundred eighty-six".