61744444605 has 24 divisors (see below), whose sum is σ = 107047343832. Its totient is φ = 32923096704.

The previous prime is 61744444579. The next prime is 61744444621. The reversal of 61744444605 is 50644444716.

It can be written as a sum of positive squares in 4 ways, for example, as 10402776036 + 51341668569 = 101994^2 + 226587^2 .

It is not a de Polignac number, because 61744444605 - 2⁷ = 61744444477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57627 + ... + 356103.

It is an arithmetic number, because the mean of its divisors is an integer number (4460305993).

Almost surely, 2^61744444605 is an apocalyptic number.

It is an amenable number.

61744444605 is a deficient number, since it is larger than the sum of its proper divisors (45302899227).

61744444605 is a wasteful number, since it uses less digits than its factorization.

61744444605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303085 (or 303082 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 45.

The spelling of 61744444605 in words is "sixty-one billion, seven hundred forty-four million, four hundred forty-four thousand, six hundred five".