6644256434 has 8 divisors (see below), whose sum is σ = 10038085680. Its totient is φ = 3298227876.

The previous prime is 6644256431. The next prime is 6644256533. The reversal of 6644256434 is 4346524466.

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

It is a super-2 number, since 2×6644256434² = 88292287121500792712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6644256431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11949824 + ... + 11950379.

It is an arithmetic number, because the mean of its divisors is an integer number (1254760710).

Almost surely, 2^6644256434 is an apocalyptic number.

6644256434 is a deficient number, since it is larger than the sum of its proper divisors (3393829246).

6644256434 is a wasteful number, since it uses less digits than its factorization.

6644256434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23900344.

The product of its digits is 1658880, while the sum is 44.

The square root of 6644256434 is about 81512.3084816029. The cubic root of 6644256434 is about 1879.9608066750.

The spelling of 6644256434 in words is "six billion, six hundred forty-four million, two hundred fifty-six thousand, four hundred thirty-four".