6543137880 has 80 divisors (see below), whose sum is σ = 21992224320. Its totient is φ = 1744835904.

The previous prime is 6543137849. The next prime is 6543137903. The reversal of 6543137880 is 887313456.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1006504 + ... + 1012983.

It is an arithmetic number, because the mean of its divisors is an integer number (274902804).

Almost surely, 2^6543137880 is an apocalyptic number.

6543137880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6543137880 is an abundant number, since it is smaller than the sum of its proper divisors (15449086440).

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

6543137880 is a wasteful number, since it uses less digits than its factorization.

6543137880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019510 (or 2019497 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 6543137880 is about 80889.6648528105. The cubic root of 6543137880 is about 1870.3750074837.

The spelling of 6543137880 in words is "six billion, five hundred forty-three million, one hundred thirty-seven thousand, eight hundred eighty".