4144340213861 has 2 divisors, whose sum is σ = 4144340213862. Its totient is φ = 4144340213860.

The previous prime is 4144340213857. The next prime is 4144340213891. The reversal of 4144340213861 is 1683120434414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3640105304836 + 504234909025 = 1907906^2 + 710095^2 .

It is a cyclic number.

It is not a de Polignac number, because 4144340213861 - 2² = 4144340213857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4144340213801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2072170106930 + 2072170106931.

It is an arithmetic number, because the mean of its divisors is an integer number (2072170106931).

Almost surely, 2^{4144340213861} is an apocalyptic number.

It is an amenable number.

4144340213861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4144340213861 is an equidigital number, since it uses as much as digits as its factorization.

4144340213861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 41.

The spelling of 4144340213861 in words is "four trillion, one hundred forty-four billion, three hundred forty million, two hundred thirteen thousand, eight hundred sixty-one".