6644636346 has 16 divisors (see below), whose sum is σ = 13291581600. Its totient is φ = 2214493968.

The previous prime is 6644636333. The next prime is 6644636353. The reversal of 6644636346 is 6436364466.

It is a junction number, because it is equal to n+sod(n) for n = 6644636295 and 6644636304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57601 + ... + 128868.

It is an arithmetic number, because the mean of its divisors is an integer number (830723850).

Almost surely, 2^6644636346 is an apocalyptic number.

6644636346 is an abundant number, since it is smaller than the sum of its proper divisors (6646945254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6644636346 is a wasteful number, since it uses less digits than its factorization.

6644636346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192413.

The product of its digits is 4478976, while the sum is 48.

The square root of 6644636346 is about 81514.6388448112. The cubic root of 6644636346 is about 1879.9966374242.

The spelling of 6644636346 in words is "six billion, six hundred forty-four million, six hundred thirty-six thousand, three hundred forty-six".