6441531521730 has 16 divisors (see below), whose sum is σ = 15459675652224. Its totient is φ = 1717741739120.

The previous prime is 6441531521701. The next prime is 6441531521767. The reversal of 6441531521730 is 371251351446.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107358858666 + ... + 107358858725.

It is an arithmetic number, because the mean of its divisors is an integer number (966229728264).

Almost surely, 2^{6441531521730} is an apocalyptic number.

6441531521730 is an abundant number, since it is smaller than the sum of its proper divisors (9018144130494).

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

6441531521730 is a wasteful number, since it uses less digits than its factorization.

6441531521730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214717717401.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 6441531521730 in words is "six trillion, four hundred forty-one billion, five hundred thirty-one million, five hundred twenty-one thousand, seven hundred thirty".