4045493038661 has 2 divisors, whose sum is σ = 4045493038662. Its totient is φ = 4045493038660.

The previous prime is 4045493038607. The next prime is 4045493038667. The reversal of 4045493038661 is 1668303945404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4043256316225 + 2236722436 = 2010785^2 + 47294^2 .

It is a cyclic number.

It is not a de Polignac number, because 4045493038661 - 2³⁴ = 4028313169477 is a prime.

It is a super-2 number, since 2×4045493038661² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4045493038667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2022746519330 + 2022746519331.

It is an arithmetic number, because the mean of its divisors is an integer number (2022746519331).

Almost surely, 2^{4045493038661} is an apocalyptic number.

It is an amenable number.

4045493038661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4045493038661 is an equidigital number, since it uses as much as digits as its factorization.

4045493038661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7464960, while the sum is 53.

The spelling of 4045493038661 in words is "four trillion, forty-five billion, four hundred ninety-three million, thirty-eight thousand, six hundred sixty-one".