6531541188870 has 128 divisors (see below), whose sum is σ = 17219877350400. Its totient is φ = 1578173718528.

The previous prime is 6531541188839. The next prime is 6531541188871. The reversal of 6531541188870 is 788811451356.

It is a super-2 number, since 2×6531541188870² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 6531541188870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6531541188871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 182381526 + ... + 182417334.

It is an arithmetic number, because the mean of its divisors is an integer number (134530291800).

Almost surely, 2^{6531541188870} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6531541188870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8609938675200).

6531541188870 is an abundant number, since it is smaller than the sum of its proper divisors (10688336161530).

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

6531541188870 is a wasteful number, since it uses less digits than its factorization.

6531541188870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49774.

The product of its (nonzero) digits is 6451200, while the sum is 57.

The spelling of 6531541188870 in words is "six trillion, five hundred thirty-one billion, five hundred forty-one million, one hundred eighty-eight thousand, eight hundred seventy".