6445989739810 has 16 divisors (see below), whose sum is σ = 12107250294336. Its totient is φ = 2466291726448.

The previous prime is 6445989739793. The next prime is 6445989739811. The reversal of 6445989739810 is 189379895446.

It is a super-2 number, since 2×6445989739810² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6445989739811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14013020944 + ... + 14013021403.

It is an arithmetic number, because the mean of its divisors is an integer number (756703143396).

Almost surely, 2^{6445989739810} is an apocalyptic number.

6445989739810 is a deficient number, since it is larger than the sum of its proper divisors (5661260554526).

6445989739810 is a wasteful number, since it uses less digits than its factorization.

6445989739810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28026042377.

The product of its (nonzero) digits is 470292480, while the sum is 73.

The spelling of 6445989739810 in words is "six trillion, four hundred forty-five billion, nine hundred eighty-nine million, seven hundred thirty-nine thousand, eight hundred ten".