644030655102133 has 8 divisors (see below), whose sum is σ = 693657429910200. Its totient is φ = 594416159606208.

The previous prime is 644030655102077. The next prime is 644030655102139. The reversal of 644030655102133 is 331201556030446.

It can be written as a sum of positive squares in 4 ways, for example, as 172032131674404 + 471998523427729 = 13116102^2 + 21725527^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-644030655102133 is a prime.

It is a super-2 number, since 2×644030655102133² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 644030655102133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (644030655102139) 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, 3069719098 + ... + 3069928891.

It is an arithmetic number, because the mean of its divisors is an integer number (86707178738775).

Almost surely, 2^{644030655102133} is an apocalyptic number.

It is an amenable number.

644030655102133 is a deficient number, since it is larger than the sum of its proper divisors (49626774808067).

644030655102133 is a wasteful number, since it uses less digits than its factorization.

644030655102133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6139656071.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 644030655102133 in words is "six hundred forty-four trillion, thirty billion, six hundred fifty-five million, one hundred two thousand, one hundred thirty-three".