1644102155383 has 2 divisors, whose sum is σ = 1644102155384. Its totient is φ = 1644102155382.

The previous prime is 1644102155363. The next prime is 1644102155473. The reversal of 1644102155383 is 3835512014461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1644102155383 is a prime.

It is a super-3 number, since 3×1644102155383³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1644102155303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822051077691 + 822051077692.

It is an arithmetic number, because the mean of its divisors is an integer number (822051077692).

Almost surely, 2^{1644102155383} is an apocalyptic number.

1644102155383 is a deficient number, since it is larger than the sum of its proper divisors (1).

1644102155383 is an equidigital number, since it uses as much as digits as its factorization.

1644102155383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 1644102155383 in words is "one trillion, six hundred forty-four billion, one hundred two million, one hundred fifty-five thousand, three hundred eighty-three".