61273707305 has 16 divisors (see below), whose sum is σ = 76143925584. Its totient is φ = 47305639680.

The previous prime is 61273707251. The next prime is 61273707343. The reversal of 61273707305 is 50370737216.

It can be written as a sum of positive squares in 8 ways, for example, as 21556406041 + 39717301264 = 146821^2 + 199292^2 .

It is not a de Polignac number, because 61273707305 - 2²⁶ = 61206598441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1879094 + ... + 1911423.

It is an arithmetic number, because the mean of its divisors is an integer number (4758995349).

Almost surely, 2^61273707305 is an apocalyptic number.

It is an amenable number.

61273707305 is a deficient number, since it is larger than the sum of its proper divisors (14870218279).

61273707305 is a wasteful number, since it uses less digits than its factorization.

61273707305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3790636.

The product of its (nonzero) digits is 185220, while the sum is 41.

The spelling of 61273707305 in words is "sixty-one billion, two hundred seventy-three million, seven hundred seven thousand, three hundred five".