744611142510661 has 2 divisors, whose sum is σ = 744611142510662. Its totient is φ = 744611142510660.

The previous prime is 744611142510643. The next prime is 744611142510701. The reversal of 744611142510661 is 166015241116447.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 644398529620036 + 100212612890625 = 25385006^2 + 10010625^2 .

It is a cyclic number.

It is not a de Polignac number, because 744611142510661 - 2⁴⁵ = 709426770421829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (744611142010661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372305571255330 + 372305571255331.

It is an arithmetic number, because the mean of its divisors is an integer number (372305571255331).

Almost surely, 2^{744611142510661} is an apocalyptic number.

It is an amenable number.

744611142510661 is a deficient number, since it is larger than the sum of its proper divisors (1).

744611142510661 is an equidigital number, since it uses as much as digits as its factorization.

744611142510661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 744611142510661 in words is "seven hundred forty-four trillion, six hundred eleven billion, one hundred forty-two million, five hundred ten thousand, six hundred sixty-one".