61345044205 has 16 divisors (see below), whose sum is σ = 78601057920. Its totient is φ = 45850609728.

The previous prime is 61345044193. The next prime is 61345044209. The reversal of 61345044205 is 50244054316.

It is a cyclic number.

It is not a de Polignac number, because 61345044205 - 2⁷ = 61345044077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61345044209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6197790 + ... + 6207679.

It is an arithmetic number, because the mean of its divisors is an integer number (4912566120).

Almost surely, 2^61345044205 is an apocalyptic number.

It is an amenable number.

61345044205 is a deficient number, since it is larger than the sum of its proper divisors (17256013715).

61345044205 is a wasteful number, since it uses less digits than its factorization.

61345044205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12405540.

The product of its (nonzero) digits is 57600, while the sum is 34.

The spelling of 61345044205 in words is "sixty-one billion, three hundred forty-five million, forty-four thousand, two hundred five".