6445989741810 has 64 divisors (see below), whose sum is σ = 16288973377920. Its totient is φ = 1628023795200.

The previous prime is 6445989741809. The next prime is 6445989741859. The reversal of 6445989741810 is 181479895446.

It is a super-2 number, since 2×6445989741810² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 613110 + ... + 3642510.

It is an arithmetic number, because the mean of its divisors is an integer number (254515209030).

Almost surely, 2^{6445989741810} is an apocalyptic number.

6445989741810 is an abundant number, since it is smaller than the sum of its proper divisors (9842983636110).

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

6445989741810 is a wasteful number, since it uses less digits than its factorization.

6445989741810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033163.

The product of its (nonzero) digits is 69672960, while the sum is 66.

The spelling of 6445989741810 in words is "six trillion, four hundred forty-five billion, nine hundred eighty-nine million, seven hundred forty-one thousand, eight hundred ten".