3644120960729 has 2 divisors, whose sum is σ = 3644120960730. Its totient is φ = 3644120960728.

The previous prime is 3644120960713. The next prime is 3644120960737. The reversal of 3644120960729 is 9270690214463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3260895582025 + 383225378704 = 1805795^2 + 619052^2 .

It is an emirp because it is prime and its reverse (9270690214463) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3644120960729 - 2⁴ = 3644120960713 is a prime.

It is a super-2 number, since 2×3644120960729² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3644120960429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822060480364 + 1822060480365.

It is an arithmetic number, because the mean of its divisors is an integer number (1822060480365).

Almost surely, 2^{3644120960729} is an apocalyptic number.

It is an amenable number.

3644120960729 is a deficient number, since it is larger than the sum of its proper divisors (1).

3644120960729 is an equidigital number, since it uses as much as digits as its factorization.

3644120960729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 53.

The spelling of 3644120960729 in words is "three trillion, six hundred forty-four billion, one hundred twenty million, nine hundred sixty thousand, seven hundred twenty-nine".