644774301217111 has 8 divisors (see below), whose sum is σ = 703884274037840. Its totient is φ = 587023178346432.

The previous prime is 644774301217103. The next prime is 644774301217139. The reversal of 644774301217111 is 111712103477446.

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 644774301217111 - 2³ = 644774301217103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (644774301217411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339712486521 + ... + 339712488418.

It is an arithmetic number, because the mean of its divisors is an integer number (87985534254730).

Almost surely, 2^{644774301217111} is an apocalyptic number.

644774301217111 is a deficient number, since it is larger than the sum of its proper divisors (59109972820729).

644774301217111 is a wasteful number, since it uses less digits than its factorization.

644774301217111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679424975025.

The product of its (nonzero) digits is 790272, while the sum is 49.

The spelling of 644774301217111 in words is "six hundred forty-four trillion, seven hundred seventy-four billion, three hundred one million, two hundred seventeen thousand, one hundred eleven".