6445014781 has 8 divisors (see below), whose sum is σ = 6729570720. Its totient is φ = 6164613168.

The previous prime is 6445014769. The next prime is 6445014799. The reversal of 6445014781 is 1874105446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6445014781 - 2⁵ = 6445014749 is a prime.

It is a super-2 number, since 2×6445014781² = 83076431054616955922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445014761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1035411 + ... + 1041616.

It is an arithmetic number, because the mean of its divisors is an integer number (841196340).

Almost surely, 2^6445014781 is an apocalyptic number.

It is an amenable number.

6445014781 is a deficient number, since it is larger than the sum of its proper divisors (284555939).

6445014781 is a wasteful number, since it uses less digits than its factorization.

6445014781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077163.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 6445014781 is about 80280.8494038273. The cubic root of 6445014781 is about 1860.9782864836.

The spelling of 6445014781 in words is "six billion, four hundred forty-five million, fourteen thousand, seven hundred eighty-one".