6644042355 has 16 divisors (see below), whose sum is σ = 10724545440. Its totient is φ = 3512130048.

The previous prime is 6644042351. The next prime is 6644042369. The reversal of 6644042355 is 5532404466.

It is not a de Polignac number, because 6644042355 - 2² = 6644042351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6644042351) 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, 1958200 + ... + 1961589.

It is an arithmetic number, because the mean of its divisors is an integer number (670284090).

Almost surely, 2^6644042355 is an apocalyptic number.

6644042355 is a deficient number, since it is larger than the sum of its proper divisors (4080503085).

6644042355 is a wasteful number, since it uses less digits than its factorization.

6644042355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919910.

The product of its (nonzero) digits is 345600, while the sum is 39.

The square root of 6644042355 is about 81510.9953012475. The cubic root of 6644042355 is about 1879.9406155793.

The spelling of 6644042355 in words is "six billion, six hundred forty-four million, forty-two thousand, three hundred fifty-five".