44645454661 has 2 divisors, whose sum is σ = 44645454662. Its totient is φ = 44645454660.

The previous prime is 44645454613. The next prime is 44645454671. The reversal of 44645454661 is 16645454644.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40323049636 + 4322405025 = 200806^2 + 65745^2 .

It is a cyclic number.

It is not a de Polignac number, because 44645454661 - 2²⁹ = 44108583749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44645454671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22322727330 + 22322727331.

It is an arithmetic number, because the mean of its divisors is an integer number (22322727331).

Almost surely, 2^44645454661 is an apocalyptic number.

It is an amenable number.

44645454661 is a deficient number, since it is larger than the sum of its proper divisors (1).

44645454661 is an equidigital number, since it uses as much as digits as its factorization.

44645454661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5529600, while the sum is 49.

The spelling of 44645454661 in words is "forty-four billion, six hundred forty-five million, four hundred fifty-four thousand, six hundred sixty-one".