61173444445 has 8 divisors (see below), whose sum is σ = 73418980536. Its totient is φ = 48931524096.

The previous prime is 61173444443. The next prime is 61173444463. The reversal of 61173444445 is 54444437116.

It can be written as a sum of positive squares in 4 ways, for example, as 2432166489 + 58741277956 = 49317^2 + 242366^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61173444445 - 2¹ = 61173444443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61173444443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 866572 + ... + 934501.

It is an arithmetic number, because the mean of its divisors is an integer number (9177372567).

Almost surely, 2^61173444445 is an apocalyptic number.

It is an amenable number.

61173444445 is a deficient number, since it is larger than the sum of its proper divisors (12245536091).

61173444445 is a wasteful number, since it uses less digits than its factorization.

61173444445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807871.

The product of its digits is 645120, while the sum is 43.

The spelling of 61173444445 in words is "sixty-one billion, one hundred seventy-three million, four hundred forty-four thousand, four hundred forty-five".