6441120645 has 16 divisors (see below), whose sum is σ = 10331502912. Its totient is φ = 3426694400.

The previous prime is 6441120641. The next prime is 6441120709. The reversal of 6441120645 is 5460211446.

It is not a de Polignac number, because 6441120645 - 2² = 6441120641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6441120641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529407 + ... + 541436.

It is an arithmetic number, because the mean of its divisors is an integer number (645718932).

Almost surely, 2^6441120645 is an apocalyptic number.

It is an amenable number.

6441120645 is a deficient number, since it is larger than the sum of its proper divisors (3890382267).

6441120645 is a wasteful number, since it uses less digits than its factorization.

6441120645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071252.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 6441120645 is about 80256.5925329502. The cubic root of 6441120645 is about 1860.6034043550.

The spelling of 6441120645 in words is "six billion, four hundred forty-one million, one hundred twenty thousand, six hundred forty-five".